Reading this reminds me of the "orange peel paint corrosion" around the time I got my 2004 F-350. The forums were ablaze with discussions over it. The paint had orange peel to it, the rail dust would get into the creases and cause a rust like appearance. Some people made the leap that it was partially due to the hazardous materials that may be present on and along railroads.
On a forum, one gentleman complained that he had orange peel paint. He got a lighted, 10 times magnified, magnifying glass to look for it. He still couldn't see it, but he knew his truck had it. He was severely disappointed when the dealership would not do anything to fix it (they couldn't see it either)
Moral of the story: Sometimes, things will whoop up the masses on the forums and before you know it, the problem is of epic proportion when it really isn't much of an issue.
In the case of truck lean, people will go out and measure their truck and determine they have a problem. Did they verify tire pressure side to side first? Nah..... Check how their in bed tool box is loaded? Nah.....
Heck, my F-350 may have it, but I don't really care to go looking for a problem.