Originally posted by A-M-K why do you think it is so much easier for Brits and Australians to do an American accent, and it's not so good the other way around?  Thoughts????

I don't know about the Australians but I think British actors are more extensively trained in dialects. There's a great clip on the special edition of Dr. Strangelove of Peter Sellers demonstrating one British dialect after another and finally getting to an American accent.