Are we of the opinion that the control surfaces of the aircraft in the game are responsible for controlling said aircraft in its virtual environment? I seriously doubt this is the case. I'd be more inclined to test the timing of the response of the aircraft to the control input itself.

Having brought up response variables, I might, again, bring up the lack of initial roll rate modeling in game. It makes no difference how your aircraft is loaded, it will achieve its max roll rate in the same period of time. Try a p-47 empty versus 500lb bombs (+ ammo).