Crusey, could you contact Castle?
On the rc-monster forum Patrick has said that torque control is not a direct current limiter, but controls torque directly
That statement makes absolutely no sense. In an "ideal" electric motor, torque is directly proportional to current, and so controlling output torque is accomplished by controlling the winding current. There are a lot of other variables that factor into this, but that's the general concept.
, and in another post that they're working towards traction control, so I guess it is based on measuring phase delay of the motor.
Uh, what? Please explain what you mean by "measuring phase delay", because that is not a term I've heard in several years of designing BLDC motors and controllers.
The most likely way to implement traction control would be to limit the rate at which the motor is allowed to accelerate. This would be rather simple to implement in software, but the calibration of it for a given setup (motor/voltage/gearing/tire size) would be pretty tricky for the average hobbyist.