You or your partner don't have UCI number? When was your application shipped?
Some members in November skipped AOR also and received SA, so I think I would wait a bit longer for SA letter, keeping in mind that it was Christmas holiday, so add few additional days. At least wait until next week, it's quite possible that you won't receive AOR now and just SA right away.
It is tempting to call of course, but in my head I have this idea if I annoy them too soon and too quick then they will delay my application on purpose, so I am trying to be patience as well. I know, stupid
Edit: I just checked spreadsheet, so we delivered on the same day. I received my AOR on 12.25 and still waiting for my SA.