A prop governor is ONLY designed to respond to POSITIVE TORQUE from the motor (turbine or piston) a governor RESPONDS to torque not rpm
Perhaps you should read your own link!
Originally Posted by http://www.hariguchi.org/flying/info/prop.html#governor
What Is Governor?[sic]
The propeller governor is an RPM sensing device which operates by means of the centrifugal force working on flyweights. The governor responds to a change in system RPM by directing engine oil to or releasing engine oil from the propeller to change the blade angle and return the system RPM to the original value. The governor may be set up for a specific RPM by the cockpit propeller control.
(emphasis mine)
If the engine is not running (producing positive torque), the RPM drops due to the governor commanding finer pitch as a result of the negative torque condition, this decreases the angle of attack and the prop rpms are reduced.
Not correct, I'm afraid. The governor is there to govern the RPM - and that is what it does. reduce power on a fixed pitch prop, and the RPM drops. Reduce power on a constant-speed prop, and the RPM remains the same (the hint is in the name!).