Pitch rate can be a player - a rapid increase in AoA can increase the stall AoA
Mmm. I thought we were talking about the aerodynamic flow changes round an aerofoil that occur at the stalling angle of attack. They are not affected in the slightest by any pitch rate term.
What is affected by pitch rate is the angle which the aircraft may reach before any handling effects are apparent. Not the same thing as the angle at which the airflow changes.
Indeed such matters call for phase advance on some stall warning systems (not retardation which would be the case if the above quote was correct) so that the aircraft avoids penetrating beyond the stall angle.