According to the OP's information in the following thread the 2011 MBP uses SATA II for the optical drive (SATA III is being used for the HDD.) I think it's safe to assume that the MBP's shipping at this early stage are likely using the faulty Cougar Point chipsets. If you're planning on making extensive use of the ODD or doing an optibay setup, buyer beware. Hopefully someone can provide some evidence that says otherwise, but so far it's not looking good. http://forums.macrumors.com/showthread.php?t=1102430 Edit: One alternative explanation is that OS X doesn't have support for SATA III in the ODD port, but is still using a SATA III port.