Indeed, the truck can be bumpstopped to prevent rubbing, however wheeling it like that sucks. I did that with 37" tires and 5" of lift in Moab. Hated the way it wheeled. We were on the bumps stops a lot and as soon as it hits, the weight is transfered to another point. This made the truck very unstable.
One of the keys to articulation is shock length and not springs. Yes, it can be set up to have a small lift with tall springs and have gobbs of articulation, but experience has shown the people not prepared to go to the expense of adding lift, will probably not do any custom shock mounts.
ShortBus has also proven that stability is way more important than articulation. Ben's previous truck was a ramp king, it could max out our ramp at the shop, however he would admit that it was not the most stable truck when wheeling it. Shortbus did about 1/2 the ramp, but it was way more stable in climbing or droping into things, as well as off-camber.
The happiest I was ever wheeling a full size 80 was with 6" of lift, 35" tires and all swaybars removed. That gives you the most articualtion, axles that move freely and a very stable body.