Yes britishers exported Rock n Roll to the rest of the world when it started but actually gained fame in North America. USA has pretty much taken over the western music industry  now. These days USA is the number one exporter of Music. Jazz, Rock, Metal, Alternative and punk..you name it, USA has the upper hand.

But i do agree that Britishers were the pioners of rock music. In my hay days i used to be a big Judas Priest Fan. I still listen to little Pink Floyd, Led Zep, David Bowie and few other Brits bands.