I've seen 5 hours of screen time over at XDA on stock and longer with the Franco kernel.
I use my phone to stream TuneInPro over BT on the way to work. My commute is about 30-45 minutes. Get in, phone is down to 92% off charge, then depending on cell coverage at my work (which shockingly is better on HSPA/HSPA+ than switching between LTE and HSPA) and my LLAMA profiles, push e-mail on 3 exchange accounts, push on Gmail, surfing talking, etc, I'm down to 71% right now. By the end of my work day, on and off the phone as usual, end up around 1.5-2hrs of screen time and then same thing on the way home, stream in the car over BT. Get home usually around 25-30%. Rest of the evening I get down to the teens for battery power and put it on the charger with 2.5-3 hrs of screen time (thus far, haven't had the thing more than a week yet) and its ready by morning.
For me, I feel like a power user based on usage but maybe I'm not. *shurg*