Mont G&J wrote:
At a recent RV show, I looked at a number of 5th Wheels, and the attached manufactures specification sticker. After looking, I was quite surprised to find that pin weight, and GVWR had little to do with number of slides or overall length. In some cases my 5th wheel with two slides had more pin weight than those with three.
Half-ton not enough truck? I don’t believe a reliable opinion can be made by just an eyeball, not anymore.
Below is an example.

Link to you-tube video
I don't think they are lying
It doesn't say how far how fast,how it will handle and stop :)