Earlier this week, I updated to iOs 6.1.2 in hopes that it would improve my battery life.
Earlier this month, I had updated to iOS 6.1.1 and it destroyed my battery life.  After the update, it wasn't unusual for me to drop 10% after just two or three hours on standby.

Since the 6.1.2 update, I can tell you that I have seen improved battery life.

I was testing my standby life on Wednesday so I turned on my phone with a full charge and let it sit for a few hours.  I'm pleased to report that after three hours on standby, I still had a full charge.

I'll let you know if things change but it appears that Apple has fixed our battery issues for the moment.