It's realistic (IMO) to a degree.
I mean if you had all the blood from your body suddenly rush to your brain, you would black out, maybe even kill yourself due to veins popping in your head.
At least that's the way I think of it.
Well I guess not all the cockpit systems are working. Like the afterburner lights and the fuel gauge.
So maybe it will get fixed in a later update or something.
I think in 1.5 I might hop into an F-15 and play around with the afterburner sounds, go up to high altitude and fly with the tuned FM for high AOA.
I also realized I've posted like 3 different things in this thread :D so much new stuff to do!