PM's sit in your outbox until the person opens it. For what I have seen if the person is online its pretty much instantaneous.
"The suitcoats say, 'There is money to be made.'
They get so excited, nothing gets in their way
My road it may be lonely just because it's not paved.
It's good for drifting, drifting away."
-Vedder
something else about PM's and time. I often have to send multiple PM's close after each other for gameinfo of my tournaments. And I often get a message that I can't send a 2nd PM so soon after the previous one.
I understand that this is usefull for forumposts, to prevent multiple posts, but for PM's can't this limitation be removed?