No one's saying "Americans can't fly" (!!), but quite a few, particularly in training, (and even moreso, among the ranks of the hapless Effohs), will tell you that more than a few Americans who've come to the Sandpit are unwilling to fly (perhaps 'operate' would be the better word) the (some would say 'unique') way EK wants them to.
Shoot the messsenger if you like, but to paraphrase our US cousins: "dem's da facts, bro."