When I used to play an on-line game, and even if I chat in eff bee, I often have this weird thing where I'm typing two conversations ahead of the other person. I'll type a comment or question and then wait. (And in eff bee, you get a little message that the other person is typing.) And then I'll get impatient and add another comment or message. And then I'll wait. And then I'll get impatient, and so on.
Maybe it's because the other person is on a slow connection. Or maybe they think before they type? Or they're doing something else at the same time?
I know that I really, really want a response, and that I get impatient without it (until I start putting up a post on blogger).