I find that far fetched. It's much more likely that accents in the two countries evolved from what came before, without either staying the same. Furthermore, t

I find that far fetched. It's much more likely that accents in the two countries evolved from what came before, without either staying the same. Furthermore, there isn't such a thing as a single "British" accent, there are a huge range of accents in Britain, just like there are a huge range of accents in the US.