I think that the problem with the overloading of the vans comes from in part the carrier and in part the driver. I don't think many carriers require a weight ticket to prove what one can haul and it seems that with the common knowledge that a 2500 model sprinter hauls X at most or a GMC 3500 hauls X isn't used much if at all.
Case in point - I am going across I80 on my way to my pickup the other day and passed by a FedEx van that was squatting pretty bad, I would venture to guess there was a lot more on the van than what should be. On the way back I was passed by an E-1 sprinter in the same form and behind him a panther van who struggled to keep it on the road because it appeared he had air bags but from his actions was still a bit overloaded.
As for rates, it depends on the carrier OVM, I was looking at them lately for vans and was surprised at what the shippers are paying.
Desperate times calls for desperate measures in some of them overweight cases...they need to pay the bills and momma is needing money...the pressure is on...
Greg...surprised at rates? High - low?