G
Yep unsteady aerodynamics is an interesting area. But all the guys who have talked to me about that have indicated that the effect of which you speak (flow not changing until a higher alpha than you experience with low pitch rates) is associated with wings in vortex lift. And I don’t reckon they ‘stall’ as such. But we are getting a tad away from the typical GA stall here I think.
I have only had to tune a leading edge stagnation point sensing stall warning vane on two GA types and there I set the vane so that the warning blew off before any undesirable handling effect (usually wing drop) even if you snatched it into a stall.
J