I overheard someone with a real twangy American accent in a store the other day. First American voice I'd heard in years. I said, "Ohmigosh, where are you from?"
And she said, "Yorkshire."
Heh. She hadn't been back to the States since 1974, so I guess she must be well and truly sick of THAT question by now. Boy, she hadn't lost one iota of Ohio.