The specs may show 77% increase, but somehow it sure seems like much more! And I've not even really broken the battery in yet with my 3 full charge/discharge cycles.
Another advantage is that I find my 7250 much easier to hold, and easier to pull out of the plastic holster due to the small step or ridge on the bottom of the extended battery door.
RCG, when you have the extended battery installed does it still fit comfortably in the horizontal active holsters you sell? That case is the one I prefer but there are times when the BB removal with the standard battery is still a little ackward.