I didnt even know there was an update until yesterday. I was on stock ICS, was fairly happy with that. I had never been prompted that there was an update. Went to "about phone" and found the update and installed. After the install my phone as been EXTREMELY laggy, freezing up, apps timing out, needing to close, force quitting things, things like Chrome browser that were had any issues with with ICS. I HATED the Bionic on GB. Once ICS came out it actually was pleasant to use and I wasnt ready to toss it against the wall every day. Now Im about back to that point. Can I go backwards to ICS?? Or can I root and install some leaned down rom? I used to have about 500mb+ of free ram with ICS. With JB its only about 350 after a fresh reboot. Not sure if thats part of it or what. Id think even with 350mb ram free it should run better than this. I dont stream anything, I dont run any widgets, NOTHING had changed in usage from ICS to JB, yet the phone is very very laggy.