From my experience I assumed the "Tracking Number" was generated and sent based on a scheduled pickup. It took a few days before the shipper showed it in their system.

I would also note, at least here on the east coast, the initial delivery date in the system was incorrect. It showed up several days earlier. Again, my assumption was that they add a little wiggle room for customs but that's just a guess.

Your mileage will vary. Not approved by the commissioner of Baseball.

M22's x 3, QS8's x 4
SVS PC12-Plus, Denon 3311ci
Ear-to-ear grin? Priceless!