I want to add a short explanation to each of the non-intuitive query vars (e.g. 'p', 'm'). Can I? I was told to ask for permission :)

Yes, it looks like this page needs some work. The author doesn't appear to be still working on it, so you can remove the draft tag. In addition to adding short explanations, you may want to link to the related docs, as a few already are. But they should probably be linked to the docs on the WP_Query page, not query_posts().

-Jdgrimes 12:26, 19 July 2014 (UTC)