From observing comments here, it seems to be regional and dependent on the carrier. In my experience it has been the USPS (though I am sure people in other regions will say UPPS is fine, but UPS is bad, or FedEx is bad). When I saw that Amazon was shipping via USPS, I automatically knew not to bother to check for it until at least the third day of the "two day" shipping. What was even more annoying is half the time it got marked as "delivered". I tried a couple of times to complain to Amazon, but that got me to no where.
I guess it depends on where you are. UPS is awesome where I am. They are always on time and have even called me to come meet them when they couldn't get up my road in the winter.
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.
Same thing here. It doesn't seem to be Amazon as much as USPS thing. It is a game of pretend. I had once UPS guy do this few times, but I called Amazon and then UPS to complain.
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 :).
