I just rigged up a contraption to measure the torque of the G27 and T500RS... G27 0.68kg * 0.45m = 3.0Nm T500RS 1.38kg * 0.45m = 6.0Nm Quite pleased as I've been telling people the T500RS feels about twice as powerful as the G27.
Yes. Setting it higher makes no difference to the maximum force, it just boosts the lower end forces (similar to going over 100% with the Logitech wheels).