Might I suggest that many of our most experienced and best trained twin engine pilots may well be quite unpracticed in sudden double engine failure and autorotation?
Well, for one, I get this emergency at every check ride. I've been flying twins since 1979 (apart from 1984/5 for one year instructing on the Gazelle) and I can't think of a twin engined check ride where it hasn't been practiced, normally given from the cruise. It's also done as part of the IR check. We don't do the check to the ground because it's a 6 million dollar corporate aircraft.