America and Americans are comparatively very courteous to Britons. I spent around three and half year in UK and couple of years in North America, in my personal experience US is a better place to live. The desi crowd of US is better then that of UK. In UK, Desi immigrants act in weird ways. Though there are exceptions everywhere.
...now, brits can say whatever they want about US, but you know it well, we are ahead of you in every way of life wit our hands down...so all you can do is keep shouting from a distance and we across from the Atlantic.