As far as I'm concerned, total BS. "Out of Round" is caused by parking on one spot of the tire too long...or consistant turning of the steering tires without moving. Both are "cured" by simply taking a ride. A few miles...all is well. Getting the tires warm or hot from being used is the secret.
Balancing: more and more tires shops are giving up the old-style lead weights and balancing machines for larger (RV included) tires. They throw a bag of "balance beads" in before the final mounting of the tire on the rim.
LOTS of vibrations for the first 5 miles or so...then everything smooths out as the bag brakes and the "beads" start doing their job. Balancing. I find that if I leave my RV sit for a couple months...I get the vibration for awhile, then smoothness Guess the beads fall to the bottom.
Most likely, IMO, another example of GoodYear bashing. FWIW. Zillions of these tires on the road........