While using google chrome on the i5 15'' MBP, whenever I DL something and the download bar shows up on chrome, my MBP switches to the 330 and stays there(im using gfxcardstatus to track everything). When I close the dl bar it doesnt go back to intel. While when I watch 720p HD Full screen video on youtube, it switches to 330, then when I am finished and I close it, it goes back to intel. I have been quite dissapointed with battery life. I was NOT expecting 8-9 hours bout def. 6-7 hours. I am getting less than 4(i am not going by the indicator but by a time set on my phone) thanks!