I took the same oath on Dec. 4 for Mississauga, and I sent the signed form immediately right after the ceremony. I called this morning, and the agent told me that the processing office received my form yesterday (Dec. 5) and it's attached to my profile but not yet reviewed. Turns out, that the 2-5 business days start once they actually receive our forms, not when we send them.
I got my e-certificate downloaded this morning (2 hours after the call) and off to apply for the passport.
Here's my final timeline, hope that helps anyone with visioning the processing time for the Mississauga office. Good luck y'all!!
Type: Online application
Location: Toronto, ON
Application: Single
Physical Presence Days: 1,171
Application sent: August 24, 2023
AOR: October 10
Able to create tracker: October 12
GU #1: October 18
Background verification completed: October 18 (Tracker updated on Oct 20)
Scheduled for test: October 27
Test invite email received: October 27 (Office: Mississauga)
Time window: October 30 – November 19
Test taken: October 31 night
Test completed: November 1 (Tracker updated on Nov 3)
LPP completed: November 8 (Tracker updated on Nov 10)
Oath invite: November 21 (Tracker updated on Nov 23)
Ceremony: December 4 1PM EST
E-certificate downloaded: December 6