If I see one of the players on a server with a ping of 0 I'll leave it alone. There have been very few exceptions I've seen where playing AND hosting on the same PC didn't produce lag.
Don't forget, a ping of 0-10 can indicate a seperate computer networked with the dedicated server, in which case you will experience no additional lag.
argh, i am about to give up on multiplayer moh, i can join a game with about 200 ping (on a 56k, that's a good ping) and it'll still lag bad, and even shoots up to 999 ping, i seen other people have the same thing happen.