Our comments are not incompatible, I'd say, given Google's and other companies recruiting standards, the difficulty of the immigration process, there must be a huge foreign engineers survivorship bias.

Despite a not-as-good-as-the-best-US-schools CS education, they managed to make it to Google.

Similarly, assuming each country has the same distribution of talent, and that the US is able to brain-drain from the top of the stack, the foreigners coming from smaller countries will look even more competent. I know very few Danish and Finnish programmers in the US, apart from Bjarne Stroustrup, Linus Torvalds, so I'm under the impression from that sample that Danish and Finnish are amazing programmers :)