21 Dec is probably a typo. @Lime06 did you mean 21 Nov instead of 21 dec ?I spoke with them on Wednesday and they were at Dec 21 application.
She asked me when did I submit, I told her in November so she check file.she said that my application was in a preliminary file
I am 26 Nov recd date. No AOR yet.
Sept /Oct 2018 applicants got AORs in like 2-3 weeks ( most of them).
Thanks !