> Amazon also keeps relability and transit time metrics on all of its shippers. I wonder how reliable those metrics are. I've repeatedly been told by Amazon s

> Amazon also keeps relability and transit time metrics on all of its shippers. I wonder how reliable those metrics are. I've repeatedly been told by Amazon support that I need to wait for about 24 hours before complaining about a missing package, incorrectly shown as delivered. Sometimes the package has indeed shown up later, sometimes not. But if couriers get a 24 hour grace period after marking a package as delivered, the aggregate reliability/transit metrics can't be very credible.