Goliath,
Actually I agree totally with you. My springs squeak like crazy but I haven't worried about it at all. I figure I was the one who buried it in the mud and drove it through the Eureka and Rodman pits. Also I am replacing the springs when I lift it anyway.
BUT, with that said, I do have one minor problem with your stance. I have owned 4 4WD trucks and have never had the springs do this on any of them. And I can tell you I have put them through stuff as tough if not tougher (in the case of my CJ-7) than what my X has gone through. I think the factory springs are junk which is why they do this. If it was normal, I would have had 3 other trucks do the same thing. But to play devil's advocate, I drove a Toyota Tundra 4WD for work a couple of weeks ago and it squeaked just like my X. I think it has something to do with the way the Japanese car manufacturers make their springs. Because the Z-71 I drove prior to that didn't do it and I knew it had been off-roaded as well. That's one of the benefits of working for a car dealer, I get to drive different vehicles and I pick trucks (4WD as much as I can so I can see how different trucks handle) a lot as I have to move ladders and stuff to install network cables.