iTunes identifies Jason Mraz’s music as “Rock” when you import in the cd. Interesting. I wouldn’t agree with that at all. I wonder if the label tags the tracks that way or if someone in iTunes world programs it in on a whim?
Usually, programs that automatically recognize audio-CD artists and track names (including iTunes) look up the data from CDDB.
So, how does the data get into CDDB?
It’s almost always user-submitted — if you rip a CD with certain CDDB-aware programs, and there’s not a CDDB record for it, the program may ask the user to submit the data. So your track names (and their capitalization), genre, etc. are just the opinion of some geek somewhere. That’s why they’re not always entirely correct or well-formatted.