I flew airshows with my dad for a while, he had an SE5a and I had a replica Triplane. We did WW1 dogfights, I used the negative alot, I did not like it, the quickest way to get Vertigo is to be looking over your shoulder, and go negative, in my opinion. It did work, but it was uncomfortable. if I had the choice of getting lead poisoning or getting vertigo, I will take Vertigo, and uncomfortable
i would have to wonder though? put yourself in the fighter pilots shoes.
you've just been drug somewhat low by that 109....you eventually killed him, but now you're seperated from your squad, and wingman. you're on the deck, heading back in the general direction of home, looking for landmarks, so you can verify where you are. you're stressed. tired. still have some adrennaline pumping.
you do a quick scan, and catch a glint of something at your 4 high. you focus there. it's another 109 bearing down on you hard. being still low, you've not many options, so you roll into your turn, hoping he follows. he does, and when you think you're under his nose, you push that stick into the dash, and barley see him go barreling past ya as you've successfully forced him to overshoot. as you pull back 'round to try n saddle him up, you can see his wings rock a little as he tries to look rearward, trying to re-acquire you. it's too late, as you're just hitting the fire button, and watch a couple of hit sprites light up, and start a fuel leak. he tries to roll away from your gunfire, but this is the worst thing he could've done, as he's just doubled the size of himself as a target, as you press the fire button harder, as if it will cause your guns to fire more. his oil cooler ignites, and he rolls over into a death spiral.
somehow, i think that the real life guys in that situation wouldn't feel sick, as they were too busy trying to stay alive.