Also, if people today are going to comment on something you write on a blog its more likely they'll comment on your FB link to the post, or they'll link to the post on FB themselves, or mention it on Twitter. Before I killed comments with my redesign I'd have maybe 2 comments on the blog when there was often robust conversation happening on FB. I'm not particularly happy about those conversations being locked up on FB, but there doesn't seem to be much I can do about it.