I ran a recent Mapquest/Google Maps comparison of visitation at Compete.com. It appears that Google Maps has passed Mapquest as the most visited mapping site:
Google Maps has been gaining on Mapquest for the past two years. Hitwise data in October indicated that Maps was closing in on Mapquest. While MapQuest may have “come out of hibernation” and have introduced a number of new features in the Local space, it does not appear to be fast enough.
These number reflect worldwide traffic. Google has a much stronger presence than MapQuest in much of Asia & Africa while Mapquest has traditionally been strong in North America. It would be of interest to see the US and European numbers broken out as well. I am sure there Mapquest is doing better.Has Google Maps surpassed Mapquest? by Mike Blumenthal