For those that say this is just USPS sucking in general.... my wife runs a small business that sends thousands of packages per year both in the US and international. The number of packages that have been truly lost numbers in the single digits. Delays happen, but rarely (most delays are the individual post offices holding on to the package until the recipient comes to the post office to pick it up... we still don't know why they do that).

If she suffered 10% loss of deliveries, she'd go out of business. Luckily, that doesn't happen... though she also doesn't label her boxes with atheist tape.