I lather and prep with hot water (warm, really, but also a hot shower). It's all cold after that.
Inspired by some of the comments in this thread, I decided to shave with cold water this evening. Aside from the initial shock (went as cold as my faucet would go) I have to say I was extremely happy with the results. Very little irritation and was able to get a lot more shave in, 4 passes plus touchups. I think I'm a convert
Glad to hear that it worked for you as well! Did you notice if the blade was cutting the same?