We're in violent agreement. I haven't disagreed with any of your posts in this thread, and most (probably all?) of my flying is right in line with the Lycoming advisory. But Ron brought it up as a subtext to the stabilized approach discussion, arguing that a "powered approach" was required by the FAA, and that power to idle abeam the numbers would contribute to premature wear. As others have ably mentioned, the 50F/min cooling rate isn't always concomitant with a power off approach, and being overly kind to the engine to the detriment of proficiency is penny wise, pound foolish.