Thanks all for the extracts, I am also a confused non-turbo prop pilot, so bare with me.
Torque at 0 % doesn't necessairly mean exactly 0, does it? That to me imploed fuel is cut off, which doesn't seem to be the case? The engine has free turbine, has it not? Any flow over the turbine wheel would create some torque on the prop shaft, even at idle. Or is 0 a ghost number from lack of proper recording?