STI usually picks up the pin and then it goes to the closet hub located in your major cities. It then goes to the hub closest to the destination. Lastly, it goes from that hub to the recipient. At least that is what I was told. I'm sure there's probably variations.
I've had 2 pick-ups that went fine from STI within the last few months and before it was usually picked up between 5-7 business days and now it's closer to 7-10 business days.