It could be for the very fact that they tuned down the CPU by 50Mhz. Not sure how that would get you 1.5 hours but hey lol. I also think the battery is bigger. A lot use the 1050 batteries but the droid is sporting a 1400. So that should be a little more of an improvement also, but once people start over-clocking their phones their talk time will go down quite a bit.