Why Can't the British Teach Their Children How To Speak

Check out this attempt to do 21 accents in English.

I notice that as she gets closer to accents I know well, I get more critical.  Thus Brooklynese and one of her Southern accents don't seem right to me, although they are not bad.

http://www.youtube.com/watch?feature=player_embedded&v=3UgpfSp2t6k