Kevan -
Here is a battery update. Left work around 6PM and my battery was at 95%, A2DP music for the ride home (about 25 minutes) and a 5 minute phone call. Exchange push goes to every 2 hours after 6PM. No TM. Taskfade is off.
So now it is 11:48 and my battery is at 86%.
I know I said I would test Sprint Nav on the way home but I felt kind of silly having it tell me direction for a route I have been driving for years.
No issues with battery life here. I would say the best I have had so far.