Compression clothing is really popular right now, runners and triathletes seems to have taken them in completely. I have a pair of Skins Travel&Recovery which I use infrequently, and they feel very comfortable when your legs are toasted from long and hard training and racing. When it comes to their efficiency, I think they might be a part of recovery, but probably quite small compared to everything you can do to recover properly.
--- non-racers. the emptiness of those lives shocks me ---