From the Speculation part of the wiki :
Xbox360 games contain a Xbox friendly partition containing DVD Format VODS displaying a friendly message to the user. (Rest of the disk is NOT readable using the original Drive, so far.)
The game Perfect dark zero has sector 0 – 3614 filled with this Friendly message. So it looks like to me, no longer speculation, but fact.
Ps is the lost password mailer on the wiki to be not working? I tried to mail one but it failed