One has only to watch Rick Mercer's Talking to Americans to get an attitude, if not an honest opinion, on the question.

Americans are certainly not dumb. They build F-22s, Space Shuttles, remote control toys to drive around on Mars. No one else can do those things. America certainly holds the brightest minds. However, because of the nature of American history, their successes, and their overwhelming belief that their systems of government, economics and military are the greatest in the history of the world, indeed the very zenith of human capacity, (some)Americans do tend to look inwards a bit more then they look outwards. At least as far as other country's cultures and habits go.