Yup, exactly what I was thinking...Very interesting article.
I also picked up on the filled tires / wheel weights as ballast.
I think they were refering to loading or weighting rear tires to improve rear traction / reduce slippage or increase the effectiveness and safety of using the front implement. It seems they kind of went from reducing the front axle loading to traction without a transition. They probably should have added a note that weight on or in the tires is not effective at reducing the front axle loading to the cons section of wheel weights and tire loading.
Otherwise a pretty good article.