I bought one out of a cutout bin and instead of an Elvin record it was a Nina Simone club date in pretty poor sound quality.
Not what I was either looking or hoping for.
I think much or all of the metadata ends up in the Gracenote database (and probably others) based on whoever first popped the cd into some application and updated the database. For example sometimes when I have gotten a very recent Mosaic set, the metadata was not set up in applications like iTunes and I had to enter it myself.