Also, as trustfundbaby said earlier in the thread:
"Group success in America often tends to dissipate after two generations. Thus while Asian-American kids overall had SAT scores 143 points above average in 2012 — including a 63-point edge over whites — a 2005 study of over 20,000 adolescents found that third-generation Asian-American students performed no better academically than white students"
I don't doubt that there is a significant Asian culture effect, but in this case it seems that the "immigrant effect" plays a big, if not greater role.