Have you been on the Apple forums about the battery issue, too?
Nope... I was noticing it. One thing I DID notice after updating to the iOS 5 was was that my iPhone 4 started playing the iPod music, streaming it over Bluetooth to the Microsoft Sync when I got into my 2009 Ford Taurus, even though the Sync system was not turned to play music from the iPhone or even turned on... every time... and it would leave the iPod playing and turned on after I left the car. I had to manually turn it off. Since that was connecting via Bluetooth radio, the BT transmitter was left on, consuming power. It did not do that before the update to iOS 5. It still seems to be doing that after the update to iOS 5.0.1 and with the new iPhone 4s...