Is YouTube Generating Music Stars?

I guess with folks dissing MySpace and the Sandi Thom incident souring fans on the idea of an internet-generated music superstar, it makes sense that YouTube is the new meme on the block. I've been digging all the tracks from Panic! at the Disco that I've heard on Sirius, but I saw an article cross the wire that claims they were "discovered" on YouTube.

Is that true? Anybody got the real skinny on that for me?