I'm loving this thread, because it's answering questions I didn't even realize I had. That said, here's another:
I know this guy who's got a MTB with platform pedals who's starting to get an itch for a road bike. (Hard to imagine, I know.) How does one give a road bike with clips or with clipless pedals a road test if one isn't accustomed to such a rig? Does the LBS set up the bike with platforms just for the test drive? If you let me know, I can let him know.