immigrants to US performing well
It is no unknown fact, that immigrants and their kids do very well in the US.
Immigrants' Kids: Nation's Brainy Superstars
I think, somehow the "work-hard" ethic (remanant of adverse societal conditions back in their home countries) combined with the richness and individual opportunity of the United States (which is now more in a have-fun and self-express ethic) results in a winning combination.