It's a little old, but here's some notes from Reddit and their traffic vs. numbers from Compete, Quantcast, and Alexa: http://blog.reddit.com/2010/07/experts-mi

It's a little old, but here's some notes from Reddit and their traffic vs. numbers from Compete, Quantcast, and Alexa: http://blog.reddit.com/2010/07/experts-misunderestimate-our-traffic.html http://blog.reddit.com/2010/07/experts-misunderestimate-our-... From my personal experience, the numbers from Alexa are complete gibberish.