Yep. If it were not for Indian and Italian restaurants, there would not be much to eat in London.
As far as Chinese food is concerned - it is extremely adaptable to the local tastes, even within the US. Within the walking distance where I live, you can find a ghetto take out outlet that sells stuff that may not be as bad but is "tailored" to Southern tastes i.e. bland, and another joint that sell a much spiced up and "authentic" fare. However, none of this resembles what I remember eating while living in Shanghai - albeit some of the US-Chinese food reminds me of what was "poor people's food" in China. But that is true of most other ethnic cuisine that I know - Mexican, Italian, Eastern European. I wonder if the same is true of India.
Wojtek