Indeed Ian.
For those of us who had to undergo periodic refresher training in the chamber, we realize that even though we were "taken" to altitude that it was all rather quick. It would be interesting to have a flight surgeon weigh in on what the recover would be if you were already at an 8000' cabin altitude for time (starting at 1 hour or so), the onset was insidious, fatigue, age, etc.
I agree in the chamber the recovery was quick. I just wonder if it would be so in the jet when it all came as a surprise and you then had to regain SA in short order to fly the jet.
Either way, thinking is quickly compromised.