Mike, the picture Debbie posted sure makes it look odd or exaggerated. If you want, with the trailer off the truck and level (just front to back) measure the distance between the ground and the J-wrap, both ends and both sides. I'll do the same when it stops raining.
My trailer is a 3010, but is basically the same frame with the body having 3 slides.
My trailer will be about 2" higher then when purchased due to the installation of MOR/ryde independent suspension.
With my truck, hitch and trailer setup I am about as level as can be.
My hitch helps a bit with that though. It is an air ride and I can set the height with the bag pressure. That is a real advantage for the times when I need extra truck bed rail clearance. For those times I can just pump the bags up to maximum and gain 2" of extra clearance.
And, as I mentioned in a previous post, one of the reasons for buying the Ford DRW when it was time for a new truck was that of all six models (Ford, Dodge & GM, SRW and DRW), the Ford DW was about 4" lower then the other 5.