[blahblah3]

What is disagreeable about his comment? Do you disagree that examining a statistic by subgroup could provide more insight into the question?

[devilsavocado]

I don't see any statistics in his comment. I actually don't see any supporting info at all. All I see is wild conjecture.

If he did go looking for statistics, he would find that the effect he describes is better explained by the expanding lower class in america, regardless of race.

http://blogs.wsj.com/economics/2014/10/07/sat-scores-and-inc...