A few more thoughts:
1. Everyone who applied to law school with a pulse knows about the huge URM advantage. It's impossible to then ignore that information after you enroll. In this respect, I think AA actually exacerbates racism. This is particularly true given the reality (documented in the book The Bell Curve and elsewhere) that a rich URM gets a massive bump while a poor white/asian kid is actually penalized. This is contrary to every possible explanation for AA and inconsistent with basic notions of fairness.
2. This references the study you mentioned:
http://www.cir-usa.org/articles/158.html