@ucbalumnus - the nurture element will become more meaningful with the new SAT if it is more teachable, and this will favor those who can afford fancy prep tutors more. The old SAT could be taught, clearly, but expensive prep had limited value. That’s why SAT scores didn’t really correlate with adoptive parental income (only biological, as wealthier parents would on average be smarter and have smarter kids).
But I guess you could say that “nurture” always favors the rich more - it just strikes me as statistical noise here. They’re making it easier to teach to the test.