Also, while I've heard a lot of folks say you really need to fly your ILS's in a 172 at 130 KIAS or the like because that's what you'll have to do at O'Hare or Hartsfield, nobody I've ever heard say that has ever actually flown an ILS into O'Hare or Hartsfield in a 172, and my experience flying Aztecs into both airports is that there is no such "need" -- I was easily able to arrange to fly the approach within the gear and flap limit speeds.
I don't fly a 172, but I'm guessing I was included in that reference. Flew into TEB and JFK in low IFR and on both occasions it was made clear that the faster I went, the better. There was an A380 behind me at JFK, I'm really not kidding. When I offered 180 to the marker, the controller was ecstatic.
At TEB, had I not offered that speed, I would've been dropped further back in the sequence. I'm sure of that.
At ATL, I was following an RJ, and there was some kinda airliner behind me with a 160kt speed restriction. I was on about a 1-2 mile final when he checked in not very far behind me.
At MSP, it really wasn't busy, didn't matter. At PHL, there was nobody behind me for the GA runway, didn't matter. At DFW, pretty much the same deal.
There are times when it matters, though. Now, if show up in the sector doing 120kts, they know they can't ask for miracles...but if you're moving along fairly swiftly when they first starting working you, good things can happen if you offer to keep that speed on the approach.
Oh, and I still maintain it's not really harder to fly an approach fast than it is to fly it slow. The whole thing is over a lot quicker. The only caveat is that you need to be able to slow down at some point, or life gets tricky, obviously.
As a test, I once flew an ILS approach in IMC at 200kias all the way down, went missed, then came back and did it normally (I was shooting approaches, so I was planning on going missed anyway). The workload of the 200kias approach wasn't particularly significant. Granted, I didn't have to slow down, so there was nothing to do, but even so...fast isn't scary.