I mean: Europeans are stronger than they think..
Only 4 of 10 players in the top 10 world ranking are US players. With Poulter, Choj and Molinari other three first class player are pressing from the back. Is the US golf tired or not hungry enough? In my point of view the problem is the incredible pressure on US golfers, to be always the top of the world. But youngsters like Jan Poulter or RoryMc Ilroy are playing much easier and more relaxed because Europeans are not so over competitive like Americans.