Harvard Law School Professor: "So, if the SAT does not measure aptitude—and if it doesn’t even pretend to measure achievement—then what does it measure? I have argued for years that the SAT is actually more reliable as a “wealth test” than a test of potential, and the most recent results bear this out."

http://www.salon.com/2015/01/11/ivy_leagues_meritocracy_lie_how_harvard_and_yale_cook_the_books_for_the_1_percent/