@Deranged Midget: It's true. She doesn't feel as powerful as Aang. At the start of the series I thought it was weird that she had already learnt three bending styles and I thought that the pacing would be too fast. But I guess she knows the basics, but she has yet to fully master them. This is probably the creator's way of extending the series because otherwise she would quickly master the elements and it would not be as interesting as Legend of Aang.