> maybe clicking anywhere in a div should open up the comments?

That's what I would expect when you are presented with a change - link gets underlined, bottom slightly "opens"

edit: Actually, those visuals could also mean a link would open. Probably even more than comments.

My line of thought was that since comments would open on the site it would have an animation whereas outbound links would use the tried-and-true underlining.

I was hoping that comments would have been shown on click.