I’ve just carried out a study of 15 UK-based sites. Both B2B and B2C. August data shows an average of 23.6%. With a high of 64% for one B2B site and a low of 12.7% for one B2C website.
See:

But, after all, thanks for providing this forum. Its a great place for me to KVETCH!!!

With one of our smb’s recently adding a mobile site I was reviewing source activity via mobiles and reviewing keywords.

Lest we all forget…..google is not blocking kewords from analytics on mobile sites.

How Frigging ironic and deeply contrary to Matty Cutts original comments about why google was establishing “not provided” (as a security issue) let alone his original comments about “not provided” not exceeding 10% of traffic.

UTTER BULLSHIT!!!

keyword traffic from mobile sites does not include “not provided” data.

Irony of ironies. There are significantly more opportunities to tie in with a direct user from a mobile device than from a land line device.

So much for the “security crap” from Matt Cutts.

I maintain the only reason big G did this was to make it harder to work on keyword research.

The dogs.

kvetch kvetch kvetch.

Personally we focus on the long tail of search which in the last month has given us visits from just over 250,000 key words and variants.

I’m not the SEO for our company but these little titbits have helped massively.

1. growth in Not Provided and other issues makes keyword research significantly more difficult for the smb.

2. then veered off into commentary about adwords/keyword research–all the details an smb or single seo has to follow to try and stay abreast of changes.

Well—taking calls from G adwords customer reps is a good way to stay abreast of various changes, points of sophistication, etc. with adwords. It saves a lot of time in research, reading, watching tutorials, etc.

The other point that grabbed my attention and is so incredibly different in a night and day completely opposite perspective is the following:

Google gives incredible detailed, polite, knowledgeable, responsive, helpful, friendly, insightful customer service directly to adwords customers.

Google treats those same smbs/ customers like SH!T in google +Local.

Its astounding. Not another business in the world would do so. Actually sophisticated large businesses such as banks and airlines use deep data resources (something google is simply 10,000 times better at) to identify good customers and treat them well.

Google could do that. But it doesn’t. Its deliberate. They don’t have to . They are a monopoly. They live without oversight from a larger entity and can get away with god awful responsiveness on the +Local side…while they treat you well and respectively on the Adwords side.

Its simply astonishing and something you can’t find from any other entity anywhere.

The content from all those smb’s is what drives searches in which certains of those smb’s do buy adwords. If not for both the content, and the usage…there would be no ads.

Why google can’t raise its level of customer service to smb’s in the +Local side to something….possibly 10% as good as in the adwords side is beyond me. Sometimes those smbs are exactly the same.

Okay…I know why they don’t do that. They are a monopoly. They choose not to improve that level of customer service. And no entity is on their collective Google A$$es to do so.

Its a shame.

my $0.02.

I thought I’d add my 2 cents from an SMB. This local auto repair shop gets around 20% not provided for all visits, but for new vists it’s up to 60%.

It’s a clear attempt to force people into using AdWords. Google want to make it hard to quantify SEO and force doubters into thinking about AdWords as the only 100% measurable form of search marketing.

Mike’s comment absolutely summed it up for me – “I agree that privacy is nice. But in this case, they are not really private. Google has the information. They have not been a bastion of privacy protection of late.”

Google Analytics will overstate simple aggregate keyword traffic in some of the more visible and visited stats packages in this way:

A). Say you are running an adwords campaign for a computer training school in Sydney Australia.
B). Say you use google analytics.
C). Google Analytics will encourage you to tie the adwords campaign to analytics for various further detail information with regard to conversions and conversion statistics.

D). For the adwords campaign you might use both exact phrase and broad phrase for certain critical keywords:

for example you might run both exact phrase and broad phrase for…

computer training
computer school
Sydney computer school
Sydney computer training
computer training Sydney
computer school Sydney.

Lets just imagine those are the 4 most searched upon terms for that service.

Just focus on the phrase computer training.

ads will show for that specific phrase and will run against your keyword in the [exact phrase] row specifically each time a searcher uses precisely that phrase.

Alternatively, broad phrase coverage of computer training might show an ad and record statistics for related phrases by users such as….

computer training in sydney
computer training near me
computer training center
computer training classes….and 1,000 different variations.

When you tie adwords to analytics…the major presentation of keyword information within Analytics will show all the clicks from
A) organic rankings
B) A pinned ranking when the user clicks on the website (not the reviews)
C all the traffic that clicks on the exact phrase ads
D all the clicks that hit the broad phrase ad

D is where the overstatement occurs for the keyword phrase “computer training”.

Those broad phrase ads might generate lots and lots of clicks, in fact potentially myriads more than usage of the exact term.

In our cases, by example, we’ll use a broad phrase for a popular term and an exact phrase. Analytics will show aggregate traffic that exceeds impressions for the precise term. That is crazy. It can’t happen.

OOF that is very misleading. Alternatively Analytics shows a column of information described as “matched phrase” That reflects actual hits for the exact term. But to know that, you have to pay attention to a lot of detail and spend a tremendous amount of time learning all of the ins and outs of all of Google’s products.

One simply has to be abreast of all of the details of analytics, adwords, etc. to catch on to all of these details.

Its a daunting task. I don’t believe smb’s have the resources or man power to follow everything from google with detail. Enterprise businesses can do this. Enterprise SEM’s can do this with specialization. Otherwise its daunting.