2015 all Rams trucks will be J2807 compliant

I am not sure if this has been discussed and I may have missed it. It appears the J2807 is a performance benchmark for a stated trailer weight but does not make any claim that the trailer weight tested WILL be within that vehicles GVWR and axle rating etc.

So is this test supposed to put an end to the whole confusion that many have determining if a specific trailer is really within their trucks capacities?