[suicideneil]

I dont think lack of torque is the issue here, you seem to be describing the issue that affects high pole count motors in that they have trouble getting moving from a standstill (thinking outrunners mainly but this isnt that far off for all intents and purposes). Higher start power would help, and high timing if those are options on the schulze. If you stall the motor when it isnt turning terribly fast, the esc will 'loose' the rotor posistion and have trouble getting it spinning again, but as you noted once its spinning past a certain velocity you wont be able to stall it terribly easily.

Have a play with a few settings, maybe lower the gearing a tad, but if all else fails there isnt anything wrong with giving the truck a boot to get it moving- is there is adjustable deadband on the radio, maybe try lowering that too.