You guys are all doing what everyone on ATV forums do. You are only looking at things from your own area/frame of reference. Both are correct and wrong at the same time.
Drifter is in Utah. A higher altitude state than TN/N Alabama area that most of the rest of you guys are from.
Water boils at a lower temp the higher you go in altitude. Combine that with slow driving UP a mountain (likely a REAL mountain, not the foothills we call mountains around here
) and you are getting even less air flow and the engine is having to work harder, just like a person would in the thinner air, because there is less O2 molecules for combustion so it is likely running more revs and generating even more heat to do the same amount of work. Because the water is boiling faster and the air is thinner the waste heat being generated by the machine isn't going to be shed as quickly. Combine that with the fact that there are fewer creeks and mud puddles and such to splash through and dump excess heat and it is very likely that Drifter may have some overheating issues that those of us in this area have never encountered.
While Drifter is wrong about Joey not running hard, he definitely does, he just does it in a different set of environmental constraints that probably never result in an overheating situation running it even harder than Drifter does. (It's harder to overheat the machine in hip deep water)
It is also possible that there is a problem with air in the cooling system or something wrong with the water pump or even an incorrect formulation of coolant for that altitude.
Don't always assume that everything is the same for everyone else in our very geographically diverse country.