Language is changing all the time and I don't think that British English is 'better' or 'more correct' or 'purer' than American English; it's just different. However I always feel a little pang when British people use American forms where there's a native version which is just as good. I think I read somewhere that it's a general linguistic law that the language or dialect of 'higher status' speakers tends to be adopted over time by 'lower status' speakers. I guess I just don't like to be reminded that many British people think of American culture and language as being 'higher status' than ours.

Here's another example I've just noticed on another thread. (If 'Elizabeth25' is American, I apologise.) 'Knock on wood' is, I discovered comparatively recently, American English for British English 'touch wood.' I remember going as a boy to see the Danny Kaye film ('movie' for younger readers) Knock On Wood and wondering what the title meant.