Average battery drain?

My iPhone 4 on Verizon is just over 2 weeks old. What is a decent expectation for % of battery drain? I never use the internet unless on Wifi at home, don't send or receive texts, and talk about 40 minutes at the most per day on the phone. I listen to podcasts via FM transmitter for approximately one hour per day. Mail program is disabled, no push notifications, no locations, and very few applications. Screen brightness is at about 33%, on auto.

I have about 75%-80% at the end of this typical day. Is this average? It seems like a lot of battery usage compared to my other phones/iPod touch that I had in the past (or even their usage combined).

But I may be way off?