sometimes it isn't. Last Thursday I sent something by FedEx for delivery first thing the following morning -- and it did absolutely, positively have to be there overnight -- and the package arrived Monday. Apparently the package was missorted in L.A., and wasn't properly read as next-day delivery (and, yes, it was very explicitly labeled as such). Arggh. Now naturally mistakes happen even with the most reliable services; it's quite possible that FedEx is extraordinarily reliable, and I happened to run across the extremely rare error. In fact, perhaps my reaction stems precisely from how much we've come to rely on and trust FedEx. Still, arggh.
When It Absolutely, Positively Has To Be There Overnight,