My battery in my MBP Retina is very poor
The energy saver is the default in settings (Brightness is about 1/3) and in a full charge the time shows 2.5 hrs. I am just surfing the web with no other programs open and BT off. I have put this to the test and am getting terrible life out of my new unit.
MacBook Pro with Retina display, Mac OS X (10.7.4)