We are in the same boat
We did our FP on 11/27 and on line status has been changed for my case in mid of Decemember, but not my wife's. I called FBI to inquire both of our cases, they told me that they returned INS both of our results on the same day.
I called TSC about my wife's case, the IIO told me that they might have not received it yet. Don't know how come they received mine but not my wife's. Wonder if they've lost it. Will call TSC in two weeks and see what happens.