dependent on the speed of the USPS.........this!
Remember that Micheal sends these out of California, so those in AZ, will get them days before New York. Another item to contemplate is that most companies follow the UPS ZONE map where the country is divided in sections. These delivery zones will determine when you can expect delivery. I was a former overnight company local operator supervisor, so you got to know when something might get there. Excluding expensive overnight or 2 day, the ground operations and packages followed the UPS model. So...if you buy something in California, and live in a Main city of Nevada, and choose ground (usually free-5 day guarantee-by shippers) you can usually expect it the next day or 2 at most. So if your following this, those that paid $15-30 dollars more for overnight, just wasted a bunch of money.
CAVEAT:
You will not get a guarantee on the ground shipment, and indeed it might take that 5 days or 2 if just one state over. So keep this in mind. Oh....and USPS service is notorious for not getting those 2 day guaranteed packages delivered in 2 days. Instead plan on 3...just saying. Good luck with the refund process.