When comparing traffic data for my own sites and others, I see very large discrepancies between Google Analytics, Google AdPlanner, Compete, TrafficEstimate.com - TrafficEstimate.com used to be a great way to get data on other websites' traffic, but now they don't seem to show data for international sites, and the data matches very closely to other sources for some sites and not close at all for others (200% differences).
Does anybody have experience with the accuracy of TrafficEstimate.com?
Does anybody have experience with the accuracy of Google AdPlanner traffic data?
