Here's the short version of the story, my buddy from Skywest went to a Part 141 school to get checked out on a 172 (plane we used to fly together all the time) & the last thing they did was shoot an ILS with him under the hood. He said he was all over the place and it surprised him how rusty he had gotten. On a side note, he said his landings were an whole different story. Something about a trainwreck I think he mentioned.
/QUOTE]
Oh, I don't doubt it at all. However, I think his poor performance has much more to do with type-specific currency than the overall ability to fly an ILS/land.
Let's take a hold for example. We fly them in white needles (FMS-based navigation). If I were to fly one in a C-172, it would be imperative that I remember the 5T's, tune/ident, etc. etc. However, if you mentally load those aspects (just like you'd load an FMS), it's not the most difficult thing in the world.
Whether you typically fly a 47,000lbs. jet or a 2000 pound piston frequently, anything you're not current in is going to be rusty.
That being said, I still see merit in your "warm and fuzzy" attitude. I just wouldn't correlate one's ability to slide down a glideslope in a C-172 to his/her ability to do so in a transport-category aircraft. Now, if he's all over the place hand-flying his work-machine, then he needs to brush up and consider himself current only after he's satisfied with his abilities.