Here's a pic from SEMA 2015 and in it, you will see 2 JK's that are identically built. Both are running EVO DTD's, both are running EVO long arms, both are running ProRock axles, both are even running the same bumpers and armor. Hell, both are even white. One is flexing out on a very tall stand and the other is just parked there. Now, I should note, BOTH JK's were supposed to be flexed out on stands. The reason why the other isn't is because it almost flopped trying to get up there. How do I know, because I was driving both of them. Once up on top, we determined that the other JK was just way too unstable and dangerous and so we brought it back down. Why was it so unstable? Because it had Antirocks front and rear resisting flex!
Had I not seen it with my own eyes and experienced this apples to apples test myself, I may not have believed it myself.