I heard that American accent is like British accent before 17th Century.
About 17th century, in Britain, there was a movement of changing the accent, which creates a new Standard British accent (like the one you hear in BBC news). Meanwhile, the American still uses the old English accent from old British accent (the British one before 17th Century).
For example, see the Sound "R" like in "Far". The American curls the tongue, while the British does not. Before 17th century, the American & British have the same or similar accent. It's only different after the movement of changing in Britain in 17th century.
Is that true?
I personally feel that the American accent is more natural.