The tires are not doing bad, there is still lots of tread on them I might get 3 years out of the tires?
I am not one to do burnouts, power shifting or have never driven the car at the strip so they should
last a bit longer the if I was really hard with them.
That being said though with 500hp under the hood and a good pedal mash in 2nd and they can break free
at over 3000rpm if its not warm out you can feel them let go and then grip again, and sometimes that
little puff a smoke out the back 
not good for tire life.
But overall I love the tires, they are great at handling and are sticky when warm outside, no problems in
the rain either with that big rubber tread down the middle.
The rears cost around $550 both shipped though Discount Tires so I am not too worried about replacing them.
When I upgraded my rims just wish I had gone with 18's/19's instead of stock size and I could go wider then
295's on the rears 
and get the larger brakes/calipers that I wanted.