Well, I'm not sure that is limited to Americans. We were recently in Las Vegas and there was a group of loud, drunk guys with distinctively "foriegn" look, speech, and mannerisms cavorting around the pool. They weren't offensive in any way but they were very "visible". We were relaxing with some Canuks wondering where theyse guys wree from. We speculated German, Finnish, then Afrikaners. We sere both wrong -- they were Dutch. Fortunately we guessed that, and were confirmed by one of the guys, before we got to speculating that they were from Mars. I'll bet guys from Mars don't wear tight speedos and drink cheap beer! But none of us would have known for sure since we are all Amercians.