I can get pretty fail about responding to comments, as anyone who reads me well knows. That said, I do try to answer all my comments.

I agree though, for meta posts, I'm more likely to expect a response of some kind. I like how Kanata put it - you're trying to engage in conversation, not just commenting on something complete and fully under the author's control. A response just makes sense.

Although I totally fail in this arena too, sometimes. ;)