I would have liked a comparison with Ogg and perhaps other formats. I hear a lot about MP3 throwing away a lot more than Ogg but I'd love to see real data on it.
I don't think the claim is that MP3 throws a lot more away, it's that Vorbis sounds better. The two are very different, Vorbis might be throwing a lot more away, but if it's only the stuff you can't hear, then it'll sound better.