Battery was draining about 10% per hour on average on idle for the iPhone 4S. It's been very stable since the update. No issue with iPhone 4, iPad, iPad 2 and the iPod touch.
I think the poll could have been improved with a "No Difference--No problems with 5.0 or 5.0.1" since it would add those who never had a battery problem.
My battery was awesome before. Even better than my iPhone 4 with 4.3. However, 5.0.1 has totally killed my device. It lost 30% battery just sitting by my bedside overnight, when it would lost 2-3% max normally.
At least push email from iCloud is working now though. But my battery life is crap.