I didn't order one, bought mine off the lot. I've owned it about 6 weeks now, around 4,000 miles on it so far, I flippin love it. I'm averaging just over 20 MPG in mixed driving, some city, some highway, some loaded, some not loaded. I bought this one to replace my car ('06 Fusion, 176,000 trouble free miles, still own it) and couldn't be happier. I still have my Super Duty for the real work stuff.
I'm thinking there is something fishy going on there, especially with the "light" tool box stuff. As has been suggested, most people would run a liner for work anyways. I don't plan on working my much, but I still have a bed liner.
I have to laugh at GM though, even the idea for the test wasn't original. They're becoming more like Arctic Cat all the time. :lol:
Here is a test Ford did, a lot tougher than the GM commercial. Watch how they load, then
UNLOAD this stuff. I read afterwards Ford was pretty leery to run this test as they thought it was going to go badly. Even they were pleasantly surprised at how well it did. On the fine print, the bed in the test did have the factory optional spray in bedliner, but the bedliner is only as strong as what it's sprayed to.