Part of the mechanics of the 101 pitch-up was due to what happened to the flow over the wing as the AoA became excessive. The wing tips were the first place where the wing would stall and this moved progressively inboard. Due to the wing sweep this had the effect of moving the centre of lift forward on the aircraft, IE the remaining lift was now too far forward on the aircraft.
When the flow over the horizontal stab became disrupted there was no longer enough control to prevent the aircraft pitching up. You could pitch up at any speed if you were hard enough on the AoA, as one of our pilots discovered doing an airtest. He pitched up at about 400 KIAS and the aircraft was out of service for about six weeks due largely to over stress of parts of the airframe.
He said he was a passenger for the first few seconds and it was a very rough experience.
This was early sixties when they were fairly new to the RCAF.