I ask because you state "Airbus considers...no additional alerts (cues?)....(are) is needed at high altitude....etc.)?
Actually, it is an excerpt from an FAA report:
lessonslearned.faa.gov
I see Manchinbird answered graciously to your question. In general, I embrace same views, but a small exception though. Instead of startle effect, I see "rabbit between headlights effect"
I like Airbus. It is a marvel, aerodynamics, endurance and safety, all great. However, FBW laws need to be simplified and "improved". It can be done quietly through a substantial software revision. I think the best is Bombardier's approach, with only two control laws, normal and direct. FBW philosophy is a combination of the older guys, the series C = A+B. Side-stick as Airbus, but C*U flight laws as Boeing, also in addition, Bombardier brings original cutting edge innovations regarding the human-automation interaction and the situational awareness.