I was interested to read that 7(!) of the crew were knocked unconscious. I guess interviews will tell us whether all or some were in correct brace position. I've wondered for some time whether the grooming requirements of some of the Asian and ME airlines may compromise the brace position of the female CC (Large, high bun hairstyle comes to mind) not to mention lots of metal hairpins close to the scalp.... ouch.. :/
None of the cabin crew had been warned of crash so no need for bracing...
The cabin crew sit in smaller seats with smaller headrests? no? Maybe that's why 7 were knocked out?