Intersesting responses. My last three new vehicles, a '93 Lightning, an '02 Lightning, and now my '07 GCSRT, have all gone through tires at about the same rate. I usually have to buy a new set every year. And yes, I usually wear them all out at the same time, usually without any crazy wear patterns. It seems I drive much harder than normal humans, since miine wear out so fast.
I think I knew that already... lol
Eric