hobbipro, when you say your panasonics "peak" with 3200mah, It sounds like you are referring to a figure based on charge time, and in fact, I would hazard a guess that you are.
If this is the case, you are not getting 3200mah out of your packs, in fact, you could be getting anywhere as little as 2500 - 2900mah.
A true 3000 mah pack will take 360 seconds to discharge at 30 amps. This does not take into account voltage. A 3300 will discharge for 396 seconds at 30 amps. A 3200 would work out to about 384 I think.
Mwh is probably a better rating again, as it does take into account voltage.
The powers gtr 3000 cells were actually already 3300's (mostly) The voltage wasn't special, but I have seen those cells go incredibly quick, quicker than other 3000s that were available at the time, without the gearing or motor changing, so it was not as bad as some would lead you to believe (although not really close to the current voltages they are producing)