Shock Cooling in a PA46

We’ve all heard it said…”reduce the throttle by no more than 1-inch every minutes to ensure you don’t shock-cool your engine”.  Does this advice apply to a PA46 engine?  Can a PA46 engine (Lycoming 540 or Continental 520/550) really be shock-cooled?  How should the engine temperature be managed? Metals expand and contract with temperature, and…