Based on the top of my head (because I really don't want to research them), they're just your average band. Nothing special for people to get worked up over. I guess they are kind of like Naked Brothers Band. They are trying to appeal to the younger generation or new listeners. You would think that people my age (or slightly younger) would listen to this. But I do not. And I never will.
http://en.wikipedia.org/wiki/Jonas_Brothers (if you still don't know). They're really not that great, crazy fans can just calm down now.