All the discussion in the http://www.rv.net/forum/index.cfm/fuseaction/thread/tid/27785106.cfm tread has been interesting. To me, it all boiled down to sure the truck can handle an over-weight camper ...
What does any of this have to do with loading an amount of weight in your truck that you are comfortable driving with, will allow you to maintain control, does not pound your truck to pieces, and does not maim or kill you, your passengers, or anyone else on the road?
This is just, "Anything goes as long as you don't get caught!"