I'm sure that between the AEV suspension, the dynamics of an extended JK with a truck bed, and almost surely sway bars that were not disconnected made for a miserable ride. Even a stock JK without the sway bars disconnected will beat you to death on a mildly rocky road. But with them disconnected, it feels like the Jeep floats over obstacles, if, of course, you're not driving too fast.
As for some of his other sentiments, they may be shared by some of us, but it doesn't help when delivered with douchebagness. I don't mind driving through an off-road park to improve my driving skills or challenge myself, but I'd sure rather be 1000 miles from here off roading a destination VS a closed course.
Regarding "overlanding", to me it's something that doesn't even require a JK. You can overland in a Prius. As for rock crawler VS expedition rigs it just boils down to the appearance of the vehicles and aesthetics. I find the look of a JK with a Gobi rack more appealing than the buggy look. Not sure why. I guess because when I look at both types of vehicles, one makes me "think" of a grand adventure and the other makes me think of cash flying out of my pocket whilst I roll and roll down the side of a cliff. If I ever did grow a pair and build up my JK, I'd probably follow the buggy-looking builds but just use full width bumpers, raised flares but not cut flares, and <37" tires. But I've modded a Discovery before then never even used that to its limit, so for now I'm happy with my stock Rubicon that I enjoy taking over small rocks and "overlanding"
And an overlander may or may not be able to rock crawl, but a rock crawler only need add an ARB fridge to be an overlander.
The thing that really bothered me the most about that guy's post was his narrow definition of Jeeping. Jeeping may be rock crawling, but Jeeping is also taking off the doors and cruising down the beach. Jeeping is not any one thing, it is a way of life, and that is something not everyone will get.