He occasionally works on movies by elite Mexico City directors, such as "Y Tu Mama Tambien," suggesting he speaks Spanish and has a work permit for Mexico. In La Opinion, the Los Angeles Spanish language newspaper, the headline reads (translated): "Mexican Jose Antonio Garcia competes for Oscar." So, I'd give about fifty-fifty odds that he grew up in Mexico, and isn't a Mexican-American. But, he could be Mexican-American, too.
Anyway, the point is that this pattern helps explain the popularity of Mexican immigration among American elites: Having a vast number of Mexican-Americans around lowers wages at the low end but doesn't produce any noticeable competition for elites or their kids at the high end.
Disparate impact? What's that?