What I can contribute, however, are my (admittedly anecdotal) experiences with Asian households, and my own personal experience with the college application process. I am not Asian.
Probably because of my own interest in sciences and mathematics, many of my friends in high school were Asian. They tended to excel in schoolwork, in no small part because they were under huge amounts of pressure from their parents. I'm not saying that all Asian families "force" their children to study ad-nauseum, but the "high expectations Asian father" Internet meme is at least somewhat based in truth, stereotyped or not.
Because of this pressure (and supportive culture of success), Asians tend do incredibly well in school, as well as on standardized tests... but the more they study, the proportionally less time they have to do other activities that make students "well-rounded," which is one of the qualities that top-tier universities value.
My personal college application process involved SAT scores that were very good, and a GPA that was solid but somewhat average. However, I had done several sports in high school, done a considerable amount of community service, had three technical jobs (two as a developer, one as a security analyst), and released open source software--all while passing my classes. I was passionate about computer science, and I believe that that helped me gain admission to very good universities.
I'm not trying to "blame the victim" with this comment--it may very well be that admissions officers harbor prejudices against Asians--but I also think it's worth noting that when you're talking about the top-tier of our education system--the Stanfords, Harvards and MITs of the world--great grades aren't enough to gain admission.