I think it depends on how it’s done. Sometimes when a post ends with a question, I feel like I have to answer that question in order to comment, or I’m off-topic. If I have no answer to the question, I simply move on. That said,
I’ve been experimenting with this technique on my own blog, and trying to make the questions open enough so that people don’t feel like they have to answer them in order to comment. We’ll see how it goes…
It’s always that way with us. We post, batten down the hatches and get ready… and nothing. Another day, we think, “Good post, but kinda boring,” and BOOM! Comments.