Come to think of it, as I was typing my reply, I backspaced to make some changes. But I still clicked "post."
I also
dugg your article. Nice one, Fantatic!
IM by it's very nature is more informal than a face-to-face or even a phone conversation, and therefore more prone to interruption. IMs are mostly, but not entirely, synchronous communication. But sometimes your train of thought gets derailed.