The kid deserved to win given his determination and story etc, and his originality with the singing in the rain piece. His dancing is alright, but for the genre he is a few leagues behind.
Watch a video like
this and pay attention to Adam Sevani, american 15 year old that was in the streets 2. Just look at the quality of that genre of dancing and you can see why George doesn't quite cut the 'elite talent' grade just yet. His story and routine made up for his lack of popping/locking/freestyle/breaking ability though.
Signature were entertaining, but only that really. Their original act was funny and new, and that's what made it... when you take that away it's just a couple of guys recycling the dance moves of a true talented legend. There's a lot of racial bull**** flying around that George won because he was white, but I don't genuinely think a couple of British guys copying an American's set routine (albeit with a little interpretation) is really the calibre fit for representing GB.