For the OP...different apps and programs can drain the battery much faster than others. Graphic intense gaming, constant use of WiFi and/or 3G, those sorts of things take a lot more power than some of the more basic apps. That said, it's possible that there's a problem. If it continues I'd have a chat with Apple Support.
Yup, that's my plan, but I want to gather some solid data first before I call Apple. BTW mine is WiFi only.
I've read various benchmark people done, and it seems that most of them are not real life scenarios, i.e. they turn on iPad and start watching movies, using apps non-stop until battery goes out.
I want to do a better test: i.e. turn in on the morning to check e-mails, news, read a little in the train, watch an episode of a tv show, keep it off while I'm working, then turn it back on for commute to home to a play a game or two, etc.