I notice this "trick" at Yahoo. I have this site about this satirical book. So I submitted it to the humor>satire> category. The editor for that category wrote me and told me it was the wrong place but he went ahead and sent it to the editor for the right category (apparently there is actually a whole category devoted to the book - stupid me) And in 3 days it was listed.

At the same time I submitted 3 other sites to Yahoo to the right category and that was 2 months ago and those are not yet listed.

So I wonder if it might actually be better to submit to a slightly wrong category if the editors are more likely to edit the sites other editors send to them.