At the end of the application process (i.e.after phase IV) I received an email with some feedback from the PILAPT and arithmetic tests. It just tells you in basic terms how you did on the tests, and tells you that there may be areas that will require attention throughout the training. It's not particularly detailed or useful feedback- the best feedback comes when you go for a meet and greet at Dibden before you go to NZ and have a one to one debrief with a member of the selection team.