Towed about 40 miles today.
All I can say is wow.
Absolutely enjoyable perfect towing experience now. I never got sway with my previous truck thanks to the Hensley Arrow, but you could still really feel the trailer back there, between the RPMs, suspension, and sidewall flex. Today towing with the new truck was a whole different experience. Truck feels almost exactly the same as unloaded. As a nice bonus pulled 11.5mpg while towing compared to my previous 7.5-8 on the same route with the Tundra.
I believe I made the right decision with the trade instead of spending $1500+ on tires and air bags etc to try to get a 1/2 ton to do a job at the extreme of its limits. Should pay some more dividends on fuel savings this summer when we take our 1500 mile trip with it.