I checked the TREC site and it's listed as:
4,756 unique visitors
ranked 287,512
On Alexa it's 37,853.
By contrast, quickoffers also has:
4,756 unique visitors (must be the same exact people going to both, lol)
ranked 151,431
On Alexa it's 90,040.
Dogproblems on Alexa is 140,991, but may get more traffic than either of the above sites.
Like you I'm not sure what real benefit this provides. After studying Alexa a little closer to gain a better understanding of why the TREC site shot up so fast, I doubt any comparisons are valid.
If it were a pure traffic measurement or some other objective criteria by itself, then perhaps that would be useful. However, to calculate some algorithm based on a combination of traffic and depth?
Anyway, I figured I'd chime in here as a first time poster. Thanks Adam for the heads-up.
Texas Real Estate Club