answer:I have always wondered this myself. Perhaps the American accent is the result of a mashing together of several different British accents that have sort of “flattened” resulting in the ultimate, unadorned British accent. I’m American, btw, and to me, English accents and American accents sound as different as chalk and cheese, but it is possible that we actually sound quite similar. When I hear an Australian or Irish or Scottish accent, for instance, I know that they are not English accents, but they sound very obviously from the same part of the world to me.