Troll alert.
But if you're serious, don't believe everything you hear.
Sure they have some more relaxed views on some procedural things like r/t, and often wear their baseball cap for restaurants which by most is considered slightly bad manners, but in general are pleasant and competent.
They don't mix much with others in hk, and the old adage that "you can always tell an American, you just can't tell him much!" I would say is only true of the tourist types that we meet around the traps, and not the American cx pilots.
One of my closest friends is an American, great guy and a very professional aviator.
You might have just picked up on some stories from the early Americans, who found it hard to adapt to what they perceived to be rigid and anally retentive training procedures, but were just the relatively high standards that we were all used to in Aust, NZ and UK.
So don't believe all you hear.
Once they ditch the hats at breakfast, and learn to use correct r/t, they'll be just fine.