There was an article awhile back in the NYT stating that in many cases asians people can be found cheating on those tests or lying about their educational background.
Lets face it. They have resources to both cheat and get tutoring on the ways to pass an exam. Lets see how everyone does cold turkey when all of the outside factors like money and resources other than race and gender are held constant.
What are the results of a study like that? That would be a more interesting test than saying X or Y is genetically more suited to this field.
Most if not all of that line of reasoning is based on 1000 year old social constructs...and the mountains of "research" that was later made up to give it credibility when people started to question these social constructs.