I order a lot online.
I get a lot of tracking numbers.
I've noticed something.
The five day shipping takes exactly the same amount of time and follows the exact same route as the overnight shipping, if you remove the time where the package just sits at one location.
What that really means is actually costs MORE to deliver it "ground" because they have to pay to warehouse it for a couple of days instead of just keeping it moving.
They are most certainly using the same vehicles to transport both packages.
Am I pissed about this? Absolutely not. I'm just amused that the cheaper service is delayed deliberately rather than the method of transportation being slower.