The trouble with **full-width** divider comments is that they assume a certain page width, when in fact the proper width of a page is open to debate.  For instance, I've always set text editors to a 72-character line width (which the wikipedia article on "Characters per line" suggests is not uncommon or unreasonable! http://en.wikipedia.org/wiki/Characters_per_line) so some automated editor operations will break 80-character comments into two lines (breaking the suite if a new comment marker is not automatically inserted).  Given this problem, and the fact that there's no particular reason why such visual divider comments have to span the entire page width - as opposed to half the page or whatever - then I'd prefer to recommend not using them.