Well, that's a decent number of samples - as of right now, 323 yanks, 324 non-yanks. Even taking into account timezone and foreigners-eager-to-represent-their-country selection bias, that's pretty surprising.

So according to this profoundly unscientific and unrepresentative poll, about half the world's (english speaking, community-seeking) startup talent is concentrated in the USA, and about half everywhere else. Interesting.