ILBlog;
The simple Shut Up! you want goes against the training of almost every commercial pilot I know. The "sterile cockpit" concept is to stop people talking about the football etc when they should be concentrating on the job in hand. The non-flying pilot should be calling out heights/distances/deviations etc.
As for the PC12 I have about 1500 hrs in them. You are right about the cockpit, it is superb to use, but it is very hard work when it goes wrong, or is set up incorrectly. One instructor I know says that in the event of a major avionics failure the situation is beyond the capabilities of most PPL holders (this guy trains them)
The investigation will eventually discover what has gone wrong in this case, doubtless we will all learn from it.