Wow, really? Never heard that before but at least not from anyone that really hauls real weight. I remember when I drove a semi, all the real haulers drove dodge cummins trucks, pulling some amazing loads. When I was in my truck and I saw a 5th wheel pulling as we approached a hill, and if it was a Ford or even a Chevy diesel I would immediatly get over because I knew I was going to have to pass them. Buddy had a Cummins 5.9, I'd like to see a powerstroke take that truck with equal mods.
Now, I will say the Ford truck is definatley a better truck, the dodge the truck will fall apart around the engine. Sorry but that POS interior gets in your nerves in the Dodge. Can't beat the interior of the Ford. The Chevy drives like a car as far as drivability and smooth ride.
If you could only get a Ford truck with the Cummins engine and the GM/Allison trans and rear end, that would be one set truck.
Oh, and the Duramax engine is an Isuzu engine.
ON A SIDE NOTE: The cummins tends to get better MPG, but it might be a bit much unless you are really going to use it, and I mean pull real weight.
Funny thing I noticed, when it comes to horse haulers, it's almost all Fords, when it comes to construction pulling bulldozers and such, it's Chevy's, but when it comes to OTR hauling, it's dodge.