One of my greatest pleasure when flying back to the US, is to be greeted in all restaurants and hotels around the country with genuinely friendly and happy faces, wishing me, albeit superficially, a good morning, how are you today? I am so and so, etc. what may I bring you today?
I have to chime in and say that this is the single most annoying thing about US service for non-US residents.
I`m Canadian and have been living in Europe for the last few years so I am used to NA style service. It still makes the hair on the back of my neck cringe when a waitress calls me `honey`. People can smell faux-familiarity a mile away.
Apart from that I have no qualms about US service levels.