[nonrecursive]

First, I don't believe the article was meant to be persuasive. As the OP mentions, he's had people ask him about how he uses twitter and he wrote the article to answer that question. I don't understand why you've assumed a confrontational attitude from the get-go.

Second, this comment is more useful than your first. Even though it's not responding to anything in the actual article, you at least give your opinion and reasons for it. As opposed to writing, "THIS ISN'T USEFUL!!! COME ON!?" Your comment is also useful to me personally because I find twitter useful and seeing your objections to it has caused me to think about and clarify my reasons for appreciating twitter.