Whaaaat? I know a ton of people from those countries, I have the exact opposite experience from you Mooz. Especially the Swedes, they're some of the smartest people I know. And coming from someone who's spent over a year travelling around the States, you definitely don't have the lock on smart people, that's for sure. (That's not meant to be ass, its just my experience)
You might want to ask yourself why one of the most powerful countries in the world is so low on those lists? I'd live in any of those countries before I'd live in the States without a second thought, but that's just me.
"This comment brought to you by Bombay Gin"