And should flight deck etiquette be a subject for discussion at crew induction classes?
Yes!
I am a shorthaul 737 Captain. I fly with mostly low time/Cadet Co-Pilots with 250-800Hrs at the moment. We had some major problems in the company with the quality and lack of assertiveness in the flow of communications from right to left when things were unravelling and the Captain was getting overloaded in the above major cock ups. F/Os advocacy skills were promoted and quite rightly so.
Speaking up and advocating ones position quickly turned into a fresh off the press F/Os constantly second guessing very experienced Captains and generally being a smart arse because their heads were being pumped with white noise and they have totally misunderstood what advocating their position is really for and the time to use it.
In summary advocacy in the communication process: Very, very important. No Captain worth his salt would dismiss it even with the steepest of cockpit gradients. Etiquette: Also very important and should be part of the training for those that need it.