Agreed AC - the idea that the rotor is a gyro just because it spins is clearly entrenched in the theorists view - I lack the science and maths depth of knowledge to counter argue beyond what I know happens in a helicopter so I'll leave them to it.
btw SFT the rotor still flaps at very low rotational speed in exactly the same way as it does at normal operating speed - very unlike a gyro. You can see this on rotor start in anything but flat calm conditions.