Wow I'm so surprised b the responses - my battery is at 10% before 1pm most days if I make more than a couple long calls. I'm on the Internet on it often but not anything I would think is an unusual amount.. Yet when I asked about it at the Genius Bar the guy kinda laughed and was like yep, iPhone gets about 6 hours max.... So I thought this is just normal????
Only seen 2 situations where battery life like this happened - first was some program failed to shutdown properly and ate significant battery time and the other was when staying at the beach where we got no signal or very little where my iphone and my wifes razor both were dead overnight trying to find a signal. I would go back to apple and ask for a replacement.