I'm sorry but that's just plain wrong in my opinion. I learned my English from american tv shows, and was also taught by the 'the queens English' standard in school. I then later moved to England and have had people poke fun at my 'posh' way of talking because I always pronounce my H's.
Most people in Britain (around my area at least) drop the H in just about any word (herb, hospital, horrible etc.) and seeing it called 'americanism' baffles me. :s
Edit: As someone just said over my shoulder, dropping the H is not americanism, is lazyism.