Well if we want to start dwelling on anecdotal evidence, then I will report that in 2007, it took 8 months for UPS to deliver one of my high value packages.
This item was packed and shipped by a UPS store in Wisconsin, it was then lost (twice) and found (twice), rerouted many times. I was on the phone with them everyday and their customer service was completely unresponsive. They blamed the UPS store ("individually owned"), they blamed me (are you kidding?), but never took responsibility once for the debacle. Thankfully, I had bought insurance on the package, but they refused to file a claim until the package could be proven "officially lost". Every time the package would pop up on their system, it would reset the clock on the insurance claim. After five months, I reported them to the BBB out of pure disgust (the first and only time I have ever reported a business to the BBB). One day I found the package sitting at the end of my driveway next to the trash can. NO warning. No explanation. No excuse. Nothing.