Wow, I'm so shocked that you get your BIL on the same day of AoR specially for an outland applicant (which I am as well). Congratulations, I hope you get your CoPRs soon!
I see many who had submitted in January have also quickly seen their statuses changed from "Submitted" to "Assessment".
I wonder if OINP is waiting to do a mass "Decision In Progress" followed by a mass "Nomination". It seems so to me.