[ThunderCactus]

"high torque" and "high speed" motors are not adequately labeled. You can actually have both.
A high end motor with powerful magnets and an armature wound for speed will have both tons of torque and speed, but will draw more amperage.
Not that the G&P M120 has any torque to start with, but the primary disadvantage of running NiMH batteries is their lack of amperage, and in motors amperage=torque. If you don't have the amperage the motor needs, it will fall short of it's torque potential.
And yes, the G&P motors ARE that bad. Horrible in fact.

it's a balancing act of sorts, because torque will decrease as your maximum speed increases. To a point where if your motor instantly ramps up to only 20k rpm, it will produce a slower trigger response than a 35krpm motor. What makes a 35k rpm motor have more torque, is more powerful magnets. But the stronger the magnets, the more amperage the motor will draw, the more it will drain the battery.
Not all motors are made equal either, we used to tune up G&P motors and it wasnt uncommon to cut their draw down by 50-75% sometimes.

And the G&P gears can't handle the 9.6 nimh battery. It has nothing to do with batteries or rate of fire, their gear axles are just shit and that's that.