I hear this a lot and while true, brevity also encourages people to be glib and repels context. I stopped checking Twitter and haven't looked back because I realized that for many if not most users (myself included), it is at best a way of wasting time and at worst an outlet for what I'll call 'nerd rage'. This is reflected in the "debates" that spring up over things like sexism -- everyone is talking, no one is listening.

That someone could take the above paragraph and argue that had I used fewer words I would have "saved [them] time" is baffling to me. Then again I still associate the quality of tweets with the kind of stuff we used to (and still do) leave as our IM client status. Things that reflect the kind of day you're having or why you're not at the computer; now you take your computer with you so you can read about and set your status before, during, and after everything.