I have the 2011 15" MBP with the 1GB 6750M. With all the threads flying around about the poor battery life, I've been taking a closer look at it the past few days and noticed that the automatic graphics switching in Lion seems to be a bit wonky. Using istat menus, I've been looking at the GPU voltage to determine if it is being activated or not. When it's activated it's usually 1.00V and when it's deactivated it's usually 0. Obviously, firing up an app like twitter or FCP activates the GPU and closing it should deactivate it. I've noticed several times now that after closing all my apps, the GPU voltage is still staying at 1 indicating that it's not deactivating properly. I even tried installing gfxcardstatus to force the intel gpu. The funny thing is, gfxcardstatus will report that the intel gpu is active, but istat will still show power being delivered to the 6750M. When the 6750M is being powered, my battery life is usually cut in half (3-4 hours) and when the intel gpu is active, my battery life is back to normal (7-8 hours). I've tried a clean install of Lion and been able to duplicate this right after installing the OS so I'm pretty sure it's not related to any settings or programs. Obviously this would only affect MBP's with discreet gpu's but I'm wondering if anyone else has noticed something similar.