There is one way to settle this once and for all.
Get Airbus test crews to take up an A330, with the same w & b and put the thing into a deep stall. Ballast could be gleaned from the sales team. The data from the result could be feed into all the A330 Sims and it could benefit all.
They wouldn't need parachutes as the AB is uncrashable I am told as the built in protections and proper pilot's would guard against this..