iPhone 4 battery Update

After sitting charging the phone to 100% Sunday night at 10:15pm.  I used it normally for the rest of that night, and all of Monday.  Today at 10:15am I see that the battery is still at 70%.  That's 36 hours of use with the battery still maintaining 70% charge.  Now I did not during this time make any Facetime calls.  I have found that Facetime drains the battery faster then anything.  I had wifi on for about half of that time, 3G the rest, with push notifications off.  I also edited a short clip with iMovie Monday morning.  The battery life on the iPhone 4 does appear to be significantly better, and Apples claim appear to be accurate, you can even exceed them depending on how you use your phone.