The problem with anecdotal experience is that is highly subjective and generally based on a limited range of experiences. Most folks own a relatively small number of tow vehicles and a small number of travel trailers over the course of lifetime. Another issue is the "apples-to-apples" problem. As I noted before, there's a huge difference between towing a vintage 25' Airstream weighing in at under 4000 pounds dry and a modern 30' Airestream (with slide-out) tipping the scales at 8000 pounds. Before we can have intelligent conservation about a towing vehicle, we really should know exactly what is being towed.
I run across this same dynamic in firearms. There are guys in the "magnum" crowd who argue bigger is always better. They would say you should have at least 3/4 ton diesel to pull a '19 Bambi and you should hunt rabbits with a .300 Winchester Magnum. Other guys will hunt Cape Buffalo with a primitive bow and arrow.
I know some people will feel more comfortable in a 3/4 or 1 ton truck. This said, there are some 1/2 ton trucks that will do a perfectly competent job towing some travel trailers, i.e., under 25' and under 5000 pounds. Once you get to the 7000 pound/27' range, I think there's room for a much better discussion about the relative merits of the 1/2 ton versus the 3/4 ton TV. Is bigger always better? Maybe. Is bigger always necessary? I don't think so.