In my experience I would say closer to 10% of my instructing time I was at the controls. We get alot of guys who come to us for their ATP rating and they have never flown a light twin let alone a piston driven aircraft, so I usually demo all of the maneuvers to let them get a sight picture and what they should be doing thorought the maneuver. But to really stay current, I get in our sim alot and fly approaches.