I would submit, it depends a bit on the task. I would expect the examinee to be able to conduct a non-emergency IFR approach pretty much on his own, with no more than the book call-outs. On the other hand, an emergency should show the presence or lack of good CRM. The entire crew should work together to recover successfully.
My standard brief, as an AF evaluator, was I'll be a good co-pilot, won't screw with you, but it is your check ride, not mine. I'll do what you ask, but won't do more. I saw a number of guys get rushed, obviously need more time, but I'd never give an additional turn in holding unless they asked, for example.