Hi Clandestino,
I don't know whether it would be even faster zoom climb to stall at higher pitch, dynamic stall or overstress but it would certainly be uglier than 11° in 10 seconds pitch-up.
I don't know either - but I bet they would have felt it.
Instead of an unnoticed, increasing pitch up - all he would have had to do was let go and the aircraft would have naturally nosed down to recover any lost speed. It would still have been trimmed to fly at M.08.