To edit a post or a page, you click its name. That makes sense. To edit a comment, you click the name of the commenter or the name of the site that left the comment. That makes considerably less sense. The name of the person or the name of the site isn't an obvious "title" for the comment, and clicking this is unintuitive.
Many people (both WP beginners, and long-time users) are confused by this. There isn't really an intuitive place to "hide" the edit link for comments -- so maybe we should just bite the bullet and make a straight-up "Edit" action link.
