I don't really think about this topic much except when in a music forum.
Exceptions would be,,,"Britney Spears",,,"The Jonas Brothers" and now "Bieber Fever", they get so much exposure due to the machinery behind them that when you compare what music, and I am using the term loosely...

, they have created versus the amount of chat/buzz about them then I dismiss them completely and conclude they are extremely "overrated".
It's all just fun really, I don't take subjects like this too seriously, certainly nothing to get me angry about no matter who says what about bands I love.