It's also entirely possible that, on average, Asian people are more intelligent than other groups. We won't really know for a long time, as discussing such things is taboo.
I'm Asian too. I don't think it's because of raw intelligence. Asians work hard, but in a very confined way, and visible way. For example in high school, you work hard in school to get into a great college, your hard work is visible.
Scientific discovery and technological innovation takes more than hard work, it takes the willingness to be obsessed with specific and sometimes obscure fields and forfeit social prestige and stability. Neither of those things are praised by the Asian culture.
I definitely don't think this is true, and I'm Asian as well. I think the parent has a better hypothesis, it's the higher bar for immigration. I bet the demographics of Asian immigrants is way higher educated than the average American. My dad has a PhD, my mom multiple Bachelors, and pretty much all of their Chinese friends had at least a Bachelors, most likely a Masters of PhD.
I would say it's very possible that genetically, the Asian population in America is smarter than the average American. Combine that with a culture that emphasizes hard work and education and you'll have extraordinary results. But don't think that Asians are more intelligent as a whole. There are plenty of idiots back in China to balance that out.