Had an email from a reader who provided the following, they assure me the info comes from a reputable source.
Load factor is caused by pitch attitude rate and airspeed, so the penalty of waiting a few seconds before pulling out of a dive is that the pitch rate to get the nose level causes a lot more g. The load factor of the rotor reaches a max at about 80% of Vne, if your speed builds too fast you will stall the rotor trying to raise the nose.
When you ask too much from the rotor, it mushes through, and you get an attitude change but your flight path is still unchanged. This means you'll still hit the ground. Stall will limit the load factor, and may cause high vibes and sloppy roll control.
It would seem that rotor stall as proposed by
AnFI is a fact of life, just not something taught to we stick jockeys. Must admit my ignorance. Bit like the meaning of Va in the FW world until the NY A300 crash I assume.