I've got an 05' Chevy Extended cab Short box 4x4 and love it.
What cracks me up about what's been said is how weak the IFS is. Is a solid axle stronger? Yes. But how the hell are you guys using your trucks? Mine has never saw "air time" and never will. However, I regularly pull my enclosed trailer with a total all up weight of 12k without a problem. I've pulled out struck cars/trucks, had it offroad but lets be serious these trucks are not rock crawlers, that's what my Jeep is for. And, IMO if you use your truck as it was intended you can't beat the IFS, it's more than strong enough and the ride blows solid axle fronts out of the water. Which is a consideration if your going to be on the road for long periods of time, I've driven my across the country in 4 days and have taken several 1000 plus mile trips all quite comfortably.
The interior of my Chevy is like sitting on the sofa in the living room compared to a Ford, way more comfy. Ford's interiors suck across the board and have for a long time, hard square cushions. And my extended cab Chevy has more backseat room compared to the Dodge crew cab. Ya can't beat the Allison transmissions, and the Duramax has proven it's reliability, it's built by Isuzu which has been building diesels as long or longer than Cummins.
All that being said. IMO, all of the Domestic diesel pickups are great vehicles, if you need a real truck there's nothing better. (Once you've had a diesel you'll never go back to gas) All of them have proven to be reliable, tons of them have made 500K plus miles of all 3 makes, sure they've all had hick-ups over the years of production but as has been stated they've been worked through. However, I think people need to be realistic about how you are actually going to use it. And, for me the most comfortable truck to live with day in and day out is the Chevy. Also, I get 21mpg on road trips running at 70 for hours on end, and 18 around town.
So, basically it boils down to brand loyalty, and comfort more than who has the best engine, transmission, axles etc. Not to mention what you can get the best deal on. Just my .02 cents.