Bergerie1, thank you for an enlightening contribution. I haven't stalled a transport category aircraft but have done so in a D - level simulator which is required to replicate the behaviour of the aircraft (in a stall) as part of its certification.
During discussions, stall and high speed buffet came up. I would be interested in hearing if you believe it is possible to differentiate between high speed buffet and low speed buffet at cruise altitude. The question came up as the enquiry into "coffin corner" arose, (in the analysis it was determined that the aircraft was a long way from either boundary).