These kind of arguments usually come down to “the reasons X succeed is because they cheat” somehow, it was leveled at Jews back in the day, that “Jewish interests” colluded against non Jews, it was much the same thing, because after all, how could as a group Jews do so well, must be cheating. With the Jews there were cultural issues there that allowed this, centered around their faith, Temples are (or at least used to be) community centers, where the temple as a whole took an interest in the kids, and there was a very strong aspect to Judaism in learning, it is a fundamental part of the faith, too.
With Asians, like with Jews, it is also too easy to make quick assumptions. Some of the Asian kids you see succeeding do in fact come from educated, well off parents, who often came here as grad students and the like, and ended up being well off. With more modest means Asians, there also are cultural issues, within the community among Koreans and Chinese, for example, there are organizations that help kids as well, and like with the Jews before them, there is a major recognition of the value of education.
There are also negatives to this, as there were among the Jews in prior generations, when it goes from being a healthy concern for the kids success into an obsession. It is one thing to support your child in something, it is another to do something like vandalize the instrument of a student applying to a program alongside your child to try and make sure your kid gets in (and yes, virginia, that does go on). There also is another side to this, about what learning is, if the obsession is with high grades, test scores and ‘doing the right things’, and doing everything possible to game the system, is that really having the kid learn? With the pressure these kids are under, there have been massive cheating scandals at elite schools and many of those caught have been Asian kids (note, I am not saying ‘Asian kids all cheat’ or that no one else does; I am just saying that the pressure to be perfect, that everything is wrapped up in a perfect grade, leads kids to do less than ethical things). It also often leads to Asian kids being pigeonholed into certain things, the way in past generations there were those among the Jews who fit that stereotype, that everything was about becoming a well paid professional with all the trappings, and that may not be healthy.
Where I have a problem is when people look at the ‘achievements’ of Asian kids and hold that up as a model of something and don’t look at the negatives. In Asian countries, a kids life is basically determined by a series of tests and what school they go to (and no, that isn’t myth, the New York Times had an article about colleges in China, and they said if you didn’t get into one of the elite colleges, students had little chance of aspiring to the middle class, that they often ended up doing little more than manufacturing jobs), and what disturbs me is this is what we are modeling into our education system, that all that matters are test scores and so forth. There is a lot to be said about the Asian communities, the work ethic, the sense that it is important to learn and do well in school, but we also have to be careful not to use a simple, stupid measure like test scores and GPA and the like as proof of anything or use that, God forbid, to shape society. I will add that with Asians, we are in the middle of this trying to see the forest for the trees, we only have had significant Asian immigration for the past 50 years or so, and in recent decades we are seeing waves from China and Korea. I can tell you that like most immigrant groups, their kids are very different from the parents, and things kind of mellow down, the obsessive parent you see (and I saw a ton of them with my son in music) is not their kid, and I would bet by the next generations attitudes change. I work with people from China, and while they want their kids to do well, and definitely put expectations on them, they also understand there is more than gaming test scores and such, so the stereotype doesn’t hold for all, either, though the description we are talking about is pretty common.