I can't argue that it works for him, but that is way more wad/lower pressure than I would run. Not sure how much air is in them but I would prefer more for top end stability also. I saw a picture one of the tire manufacturers had and it showed the optimum had 3-4 wrinkles in the sidewall.
But every car is different. I have been going up on pressure in mine lately. Running 6 3/4 right now. I just changed to a 14.5-33 from 16.5-33 so I will be starting over testing, but I am starting at the same pressure. JMO
Curtis