I met plenty of foreign tourist on my cruises, most of whom say Americans are the most friendly.
I can't say the same about some of them.
I completely agree. I work with exchange students and they always talk about how friendly Americans are and how they wish people in their countries were the same.
Also, I just returned from Italy and I found the people there to be extremely abrupt. We were almost always much friendlier to them than they were to us.
Also, we had an unexpected night spent in Warsaw and may I say, not so friendly there either.