"DVD drive pops open on side when eject button is pressed " Don't they all do that?"
No, neither the MacBook nor MBP (nor the iMac for that matter) have anything to "pop open" (they are slot loading) Not sure what the rumor is talking about, unless they are claiming Apple put a door or cover over the slot, or made it tray loading? Or, worse, there was an Apple patent out there that showed a notebook with the DVD drive on the bottom, with a door that...yeah, popped open downward. Ugh.
:-) Either way though, that just sounds off to me.