Which Shipping Company Is Kindest To Your Packages?

Ant writes "Popular Mechanics mailed a bunch of sensors on an epic journey to find out which American shipping company is the most careful with your packages. From the article: 'One disheartening result was that our package received more abuse when marked "Fragile" or "This Side Up." The carriers flipped the package more, and it registered above-average acceleration spikes during trips for which we requested careful treatment.' Here's what they found."