You are right... and actually even on those photos the other member took, you can see the 747 Paint say "World Services."
I PERSONALLY believe they are using WorldEase, but that was a rumor that they weren't. Sorry if I didn't make that clear.
And even on Apple's site it says "If Saturday delivery is not available in your area, will deliver Monday April 5th." So sorry if that happens to be you 🙁 And most likely it is, because it says "not available in that area..." And thats UPS's system rejecting that service type and reforming it, so you may even have two labels on your package depending on how your local facility will handle it.
good luck tho! 😀