Francesco, based on this and many of your other posts here and on other bulletin boards, you're prone to hysteria. Calm down.
Originally Posted by Fragomeni
From time to time Consumer Reports does a delivery services test. USPS, UPS, FedEx, ... They're all equally good at losing parcels.
In my limited experience, USPS is the best of the lot, but my sample is much smaller and much less well-designed than CR's. And in my experience USPS domestic tracking works very well. They've never lost anything I've sent, and neither has the foreign post office involved lost anything I've sent. What I have learned is not to use first class. Regardless of what USPS says, first class often just sits, sometimes for weeks. Priority and Express Mail have worked very well for me.