So I am doing a test now. I completely factor reset my phone last night and drained the battery until it shut off and then did a full charge to calibrate the battery.
I have BT on, WiFi off, Screen set to 30 sec. timeout, Medium brightness, 2 emails on push, and 2 live tile apps running in the background (WeatherMaster and PlusPoints).
I took the phone off the charger at 7:30am this morning. It is almost 9:00am for me so roughly in 1 1/2 hours on pretty much no use I am down to 94%.
I will keep you all updated.