So I was just thinking about an episode of Dogfights from this season, I think the one titled "P-51 Mustang." Anyway a P-51D is being chased by a 109 in a slightly descending right turn, at what speed they were at they didn't say. What he did to evade I have been unable to duplicate in the game but he described it as this - pull the stick into your gut to stall the aircraft, kick full right rudder, then the engine torque will pull her back into something flyable and you recover a couple thousand feet later. I'm just gonna assume somebody else saw this episode and remembers what I'm talking about and have tried to pull it off themselves. So far all my attempts have resulted in the plane wiggling a little, but nothing like what the pilot described. Easily attained to the left, just not to the right.
I believe the same episode also had a pilot in the same situation, being chased in a descending right turn, and the pilot snapped the mustang up and to the left, did an insta 360 spin and managed to land rounds on his pursuer.