At the risk of sounding pretentious, and if I do, then you will have to both live and deal with it, I must say that quantcast.com is certainly not what one could or should consider a credible, or even reputable, source.
As true academics, if that is truly the case here on letsrun.com, we should know that, in fact, the defense of a point and its validity is almost holistically predicated on the title, qualifications, and experience of the expert, usually in an empirical matrix, though sometimes theoretical.
Quantcast.com, established in 2006 as a small company, does not have the longevity or consistency of standard to even remotely be considered credible. I could easily cite some of the websites that they use as not credible either, but that would be digressing.
While they have posted statistics, there is no solid evidence of a control group in this study. In order to have that, we would have to have represented, in a real survey, the education level that we possess to even enter letsrun.com. Those survey results would then have to be furnished to the company, say "quantcast.com," after which, a valid study would be conducted.
There is no evidence of any of this. If, in fact, the study is comprised of myopic web-searchers who look for the words like "college," "educated," and "degree," then the study is just, to digress entirely, crap.
As educated people, we know that this study represents nothing except the depravity and desperation for news and information that plagues this current society.
Professionally speaking--get a life!
Respectfully,
Mike, M. Ed., Cross-cultural Teaching National University, San Diego
B.A., History, University of California, Santa Barbara
:)