Being a 300lb person, I find this hard to believe. However, I cross rotate my tires on my Neon. I do not know how the shop rotates the tires on my Impala.
I have never experienced unusual tire wear. In fact, the tires on my Neon were heading for more than 80k miles of use until I turned them in on a sidewall cracking warranty. On a previous work car, Prius, I never experienced unusual wear and that car was serviced solely by a Toyota dealer. Also got 80k miles out of the second set of tires on that car.
It's not the weight, it's something else.
I have never experienced unusual tire wear. In fact, the tires on my Neon were heading for more than 80k miles of use until I turned them in on a sidewall cracking warranty. On a previous work car, Prius, I never experienced unusual wear and that car was serviced solely by a Toyota dealer. Also got 80k miles out of the second set of tires on that car.
It's not the weight, it's something else.