I find this experience interesting. Here in the UK amazon offers next day delivery (and in same cases, same day delivery), and often delivers next day even when they don't claim they will.
I have had problems with counterfeits though.
FedEx is hit and miss, depends on the contractor. One just stuffed a package in my mail box and marked it as delivered on my "Front Porch". My mail box is a mile away. Close, but no.
Amazon shipping - I hope it never expands to my area.
In reality, most of the time I don't care when exactly it will arrive, but for that one thing I do, it always is day late :).
The U.S. has next day and same-day delivery from Amazon, as well. It also has two-hour delivery in most cities.
But not every item is available in every delivery window. And not all delivery windows are available in all locations.
One of the advantages of living in a small country like the U.K. is that it's much easier to cover the whole territory. (U.S. is 40x larger than U.K., with 1/8th the density.)
Even though it's habitual for euro-HNers to compare themselves to the U.S., it's more often than not meaningless.