Shipping is all random on Supreme items. It basically doesn't matter if you order first or last, or live 5 miles within SUPNY or 2500 miles.
It's basically a printer spitting out thousands of order confirmation papers (the exact same one you get with your order) - and the worker just grabs them as they feed them out; fulfills the order than goes back and grabs another order confirmation sheet and continues to fulfill that order; rinse and repeat until every order form is gone.
So they basically just grab whatever document is at the top of the stack as it feeds it out the printer, regardless of order time or order priority.
Just some insight there, it's exactly the same method Best Buy used when I used to work in the stock room back in 2007, and online orders were being processed.