I have had charges with AMAZING battery life and ones with the draining every minute crappy battery life. One thing I noticed this morning is sometimes when I take my phone off the charger ( i charge it everynight, overnight) it IMMEDIATELY drops to 99% or 98% and even once instantly to 97%.
When that happens something is obviously screwing up in the software. This is when i get the drain super fast battery. So i plugged mine back in this morning and let it go to 100% and then made sure after I take it off that it stays at 100% like it should.
I went 3.5 hours off the charger this morning, almost no usage, and it stayed at 100%. After that I made a call, checked email, looked at a facebook album with 100+ pictures, etc and now 5 hours off the charger i am at 93%, which for me is totally acceptable.
Anywho, another thing for all you guys to try. Make sure when you take it off the charger, it stays at 100%, then use it as normal and see if it has good battery life.
I'm still waiting for the Apple software update fix but thought this was an interesting theory in the meantime.