Need to clarify what we're trying to model here. Is it simply loss of visual cues, or full loss of consciousness? I've pulled 9G without ANY loss of vision, and I've grayed out at a mere 6G before. The big keys are whether or not you are wearing a G-suit and whether or not you are ready for the G onset.
If you're "planning" a manuever, it's quite simple to do enough of a "g-straining manuever" to be ready and withstand the g-onset with little or no effect. OTOH, if you're following a wingman (or target) and he suddenly makes a move which you follow instinctively, without G-straining, you can quite easily tunnel-vision, grayout, or even go nighty-night. Argue if you must, but there are single-seat fighters lost every so often due to GLOC during air combat practice, where the "highly-trained, physically-fit steely-eyed warrior" simply G'ed himself out.
The combo of G-suit and G-straining is good for about 3 Gs, and of course the WW2 pilot didn't generally even HAVE a G-suit.
Actual blackout, of course, is quite different from simply greying or tunneling. IMO what we have is a pretty good simulation of what used to happen to VISION while flying T-37s and T-38s, which by and large operate at about the same speeds and loads as the planes in AH.
Now, whether you can fly a plane while fully greyed out is another question entirely (and if we model blackout as actual loss of consciousness, then of course not only can you NOT fly, but you'll need a bit of recovery time as well). I will say that flying a REAL airplane with your "eyes closed" is not something you can do accurately enough to, say, continue an ACM manuever, while you could probably do fairly good "blacked-out ACM" whilst sitting at your non-moving, unaccelerated desk
Actual blackout point is something that will vary from one guy to the next, but 11G is NOT a good "average," IMO. That number comes from 50 years of study, training, and technology. The average WW2 pilot didn't have the benefit of any of that, didn't necessarily have much of a diet, much of a workout regimen, or much sleep to base his G-tolerance on.
Just stirring the pot a bit, but we do need to determine some sort of "average" tolerance and apply it across the board. I think we're pretty close VISUALLY, but if we're modeling "post-blackout" effects, we need a bit more data than "my buddy pulled 11G in the centrifuge," and "my grandad pulled full stick all the time and never blacked out." That's TWO points of data--hardly enough to change the model over.
--jedi
