I'm not from the US - as are a lot of players here. Especially on .en Alpha, there were a lot of European/Asian players and very few American players. On top of that, most of the American players didn't have much of a chance when they faced an European player with 2+ years experience.
Now, though, it is starting to flatten out a bit, and I think there will be more Americans than 'foreigners' on the future servers - if there aren't already.
But, as you all promote America, 'land of opportunity and cultures', I think the US servers represent that quite well.
It's actually a lot easier to have people from lots of different countries in your alliance, in Kappa my 'squad' is from all over the world, and the country, makes it a lot easier, while one sleeps, another is awake ;-)