Had been stuck in priority date hell for the last year, PD became current in October.
Had my 2nd FP at the begining of November. (Nov 2nd ish)
Lud updated on Nov 18th saying the fingerprints results had come back
Email notification today saying a card has been ordered (Dec 5th)
Seems odd that I didn't get an email notification to say my 485 had been approved, but what the hell. I'm just so happy they have ordered the card.
Obviously your situation may be different, and the christmas holidays might cause it to take a little longer than mine did, but based on what happened to me you should hear something before the end of the year.
Hang on in there, you're very very close to the end!