BOAC,
I took your proposal seriously enough to spend a number of hours today trying to figure out if it was true or not. I thought the results I obtained were worth broadcasting, as a contribution to discussion. I'm sure they are not the end of the story.
I can't at present join the dots in your argument that people have to be trained to recover upsets in large commercial airplanes. I just can't see how that can realistically be done. Neither, apparently, can Airbus's main man. If you have a proposal, please do bring it up for discussion.
PBL