ALL of them? Almost certainly not. You're just being plain, old fashioned racist. You also sound ignorant and naive to claim to have never met a black or Hispanic student who shows a single sign of valuing education.
Do you live in the Bay Area? If so, take a trip over to San Jose and visit some of the high schools schools there with predominantly white & asian students (there are only a few). They're not garden parties. They're rough schools with gangs and drugs.
White and Asian neighborhoods generally generate higher property taxes than black neighborhoods. Schools are largely funded by property taxes. Therefore it should come as no surprise that White and Asian schools are on average better.
A predictor that is toes a really fine line between statistical reliability and outright bigotry.
In any case, we know that socioeconomic status is a far better predictor of educational success than race. There is a Hugh correlation between race and SES but it's far from causal. I think the main objection here is that he seems to claim it is.
I might have the same high motivation to be an awesome games programmer, but that still doesn't mean I will be as good as Carmack.
I don't fault LoveLinux for his viewpoints, as they are based on his observation; and he is trying to make the best decision for his kids... I think if what he/she had said, was said by Bill Cosby or George Lopez, we would be applauding their honesty...