Got me there with the actual quote haha. I'm just going off of what the FMCSA told me when I got my DOT number. Chances are, if your GVW is over 10,001lbs, your rating is over 10,001lbs, otherwise you would be overloaded. Take a dump trucks for example. Truck weighs 14, rated for 19500, no matter what, based off of either rating, you need a DOT. Then you get into license plate ratings, etc.
To put it simple DOT just makes it confusing for all of us to try and make a dollar, however it thankfully keeps the jokers that make a bad name for this industry off the road.