I don't really see how the pilot was wrong. It was well known that you could kick the rudder on the 109 and get a hell of a lot of yaw out of it, despite the smallish rudder. Although I do agree that he's wrong with the "take on 5-6 mustangs". I can't think of a fighter mismatch in WWII that would go that way without taking something from 1939 and putting it up against something from 45.