Years back, a Pan Am 74 on final into JFK, Captain flying, FO 'notices' PF slumped over. He dutifully takes control, lands and taxis to the gate uneventfully. Next day at the employee cafeteria, most employees were discussing this event. A table of Captains were discussing how "....it's amazing the First Officer knew how to land the plane......". At another table full of FOs' the discussion was how they all "......couldn't believe the FO realized the Captain was incapacitated...."