I put the update onto my iPad 1 last night and finally got the multi-fingered swipe option working. I then went onto the Apple website and was amazed at the number of people, like yourself, whose battery problems appear to be worse than they were before the upgrade.
It all seems very strange because a poll on one site found that the vast majority of IPhone 4S users had no battery problems at all. It seems to me that it may all come down to a manufacturing fault on some phones.
Certainly the shouting going on is doing Apple a power of no good. They need to sort it out - fast.