Thanks Fair Skies, here's hoping that's the case and we'll be getting the offers in the next few weeks.
As a bit of additional info (partly regarding your question on how long the wait will be), I was told by the CPL at PSA that Canberra has 3 weeks from when they get the file (the 20th) to make a decision and reply to PSA and from there PSA apparently will contact you to let you know that you've been given an offer. So December 11th their deadline for decisions, and if you haven't been contacted by PSA by then, then Canberra has knocked your offer back and you go back into the pool for the other two services.
I think they contact you by phone first to let you know before the letter is sent out, much like for Flight Screening itself. Though I'm not entirely sure on this