As far as Korea, most of China, and Japan goes, I think the ratio remains the same.
If you visit those countries today, are they are 90%+ socially awkward people with uber work ethics? No.
I think ratio is similarly retained.
I think the outliers that come from ignorant nowhere rural parts of China are greatly exaggerated in media.
OP's thread title is just ridiculously stupid and misinformed imo.
I don't know about the 90% number but I will say that the Asian Americans I've met had much more social skills than Asians who just came here (FOB's), perhaps it is due to language barriers.
