"common courtesy"? maybe not so common though Lou.
do you regularly say it? how many people say anything polite in return?
I would guess that at least 3/4 of everybody is quiet and thats even in slow chess (like G30).
in blitz games, I don't think I've ever had much chat- and I am sure you could play hundreds to thousands of G10's without a comment. even After the game- when it wouldn't make a difference. (obviously no one would waste blitz time to chat with his/her opponent)
why is it important to you? curious.
i always turn off chat when i start a game.
the forum is a place for chat, in my opinion.
when my sense of privacy is stepped on by the other person thinking that they are due a response on a correspondence site i think of what the most important man in the world might say.
It's not chat. It is said after the game and is common courtesy.