I was fortunate enough to stop by Rowling's site and get to sit the W.O.M.B.A.T.s; today I "received" my scores (by going back to http://www.jkrowling.com/en/ and clicking on the W.O.M.B.A.T. card perched on the keyboard). For what little it may be worth, I have officially achieved an "Outstanding" on my W.O.M.B.A.T. Grade 1:
Your exemplary powers of deduction and a formidable knowledge of the inner workings of the magical world reveal you to be a witch or wizard of genuine skill and learning. This first examination has barely tested you. We look forward to challenging you to a further and more difficult examination in due course.
/s/ J.K. Rowling
Wizarding Examinations Authority
Governor: Professor Griselda Marchbanks, CDMG, APMO, fdBB
Further commentary available at http://www.hp-lexicon.org/about/sources/jkr.com/jkr-com-door.html
I guess it just goes to show that, even after all these years, I can still ace multiple-guess tests with no prior studying.