"White" women have benefited the most from AA.
"White" males continue to practice affirmative action.
It seems to be this is all going to come down to how you define AA. The way I define it, this statement for the most part isn't true (for the most part, there are things like legacies), but I understand the original poster point.
The way I understand AA is to mean using devices to create a naturally integrated world. In other words, without past discrimination the country would be naturally integrated, so that affirmative action must be taken to remedy the effects of past discrimination that created this un-natural non-integrated world. From a legal standpoint at the least thats one of the premises of AA. I doubt its true, even if whites, hadn't discriminated against Asians, African Americans, Native Americans, Hispanics, Eskimos (I just use Eskimos because they are included in some urm categories), there would probably be some natural segregation, just become smaller social networks create personal bonds between people, which help people deal with the obstacles life throws at them, and an easy way to form a social network is shared characteristics like race, language, and other things that I can't think of.