After installing 5.0.1, I seem to be getting about the same battery level as with 5.0, or maybe even a bit lower. Can anyone confirm that a clean install is needed for the update to take effect? This is what happened with my iPhone: 1) Receive iPhone on 14th. 2) Clean install multiple times. 3) Install 5.0.1 OTA. 4) Exchange iPhone for one with 5.0.1 preinstalled. Thanks!