To me towing is like TwinTurboStroker said, hook it up to a horse trailer. Getting a big load going slowly, nice PR but nothing else. Hook my 10k boat to its bumper and then do 60 with gusty side winds, then we talk. I also doubt the tranny of that would hold up to heavy towing use.
But on the other hand, that is not what it is built for. It is a grocery getter for people with a lot of money that want something different. Heck, you could get 2 brand new F350 duallies for one of those. Our trucks were built to haul several years worth of groceries a once down the back road and do it again tomorrow and the day after.