That's because, unlike the rest of the world where its common for people to speak more than one language, the American viewing public in general is deeply rooted in the assinine belief that American English is THE only English that they need to know and understand. Anything else, even a mild British accent, is just unacceptable as being foreign and therefore unpatriotic. Obviously, the Americans who are members here are among the minority, who find it refreshing to talk to people from around the world and simply adore Sean's Yorkshire dialect.