Two points:
1. The research community is very small, not even 1 % of the population and 2. It is composed of a large number of foreign talents (Indians, Russians, Asians, Europeans) lured by higher wages they could earn in their native countries.
Using very select few to draw conclusions about an entire nation is really bad logic.
Another point - in this entire discussion I tried to point at the uniquely US institutional factors that promote mediocrity - and nowhere did I say that Americans are a bunch of knuckle dragging dolts. Au contraire, I said time and again that there is no difference between the US and other countries in the basic behavioral model - transaction cost minimization - that promotes mediocrity. The difference lies in the factors that make transaction cost minimizing behavior easier here than in other countries.
BTW, as Joanna aptly pointed out, the openness to immigration is perhaps the singular most important domestic factor that propelled many US institutions to excellence. It makes a stark difference to most other developed nations that remain largely closed to immigrants. However, that fact eludes nativist populists on this list and elsewhere.
Wojtek