i can understand all of his reasonings:
Less risk of front tires deflating
Less risk of aquaplaning
Better braking
Better grip
Better comfort
Better absorption of frontal impact
except the first one.. it wouldn't have less risk of deflating tires, but rather less of a noticeable driver feel if one tire were
to loose significant pressure, (much like a dually truck, if the inner RR tire goes flat, the outer RR will keep the truck up to height)
the other five are basically advantages of better tires, but 6 tires to contact the road as apposed to 4 will help on just about everything,
except your wallet when they get bald.