I got these this AM:
and I found that the media code was R03 which is a Ritek 8X code. All programs and burners agreed. HOWEVER, when I tried any way to burn them at 8X (many firmware changes were of no help) all the burns were trash with PI errors in the 600s. They do burn very well at 4X but you will need to set the speed manually in your burn program or they will ratchet up to 8X by default. Very Strange.