The Bell Curve's data is based on Asians in America. It would be a sampling bias/selection bias if using that data to draw a conclusion on the whole Asians outside America.
I may agree the Asian immigrants in US perhaps have higher IQ which is very understandable. If you're mediocre it's hard to survive in America as immigrants.
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2 very worthwhile posts today. Keep up the good work. You’re not tedious at all.