This sort of comment highlights the problem of not showing comment scores. I agree with David, so I upvote him. However, no one knows that I agreed with David unless I specifically comment with a "+1" or something else (such as this comment). The way it is now, only those who understand the inner workings of the site's comment showing algo know that, because David's comment is (at the time of this writing) the top comment, that means that either (a) David's comment has been upvoted the most, or (b) David has a high karma, or (c) etc, etc. I wish I could just see a (46) next to David's comment - that would validate my agreement with David moreso than just "Here - have an upvote".