Is Twitter Like Speech or Like Writing The Answer Is Yes

Is Twitter like a spoken conversation, the kind you would have with friends in a bar? Or is it like a written discussion? One of the things that can make Twitter hard to define is that it can be both of those at the same time.

Source:
http://gigaom.com/2011/06/04/is-twitter-like-speech-or-like-writing-the-answer-is-yes/