I tried to follow this but got a bit lost... I cannot see how wing bending relates to anecdotal evidence of aircraft with higher wing loading being able to out-turn another.
Also please explain how pull out from a dive 'unloads the prop disk'. You are talking about aircraft with constant speed propellers, so this is not power related, are you referring to precession?
Btw have you considered the fact that the 109 had leading edge slats? I dont know much about that particular installation but on the Helio Courier high power / high AoA the slipstream from the propeller can force the slats closed (the inboard on one wing due slipstream rotation), reducing the stall AoA of that part of the wing. Reduce power and the slats pop out again.