Generally you cannot take it to mean anything in particular. Posssible decisions after visiting a site include
The only thing that you can reliably infer is that your submission did reach the database of not-yet-reviewed sites (so there is no need to resubmit)
Generally the most effective use of your time wrt to getting listed in the Open Directory (and, generally, wrt your site's success) would not be worrying about the review process but investing in your site's quality.
In my opinion a lot of webmasters would profit from getting a critique of their site from a friend who is (ideally) totally naive about the site's purpose and subject matter - they'd get pointers on what information is missing i.e. where the site creator's blind spots are.