I put 5k miles on mine this year with one auto x. I expect them to easily last through 2014 with a couple auto x and road courses in the mix plus another 5 k miles. They aren’t as sticky as brand new (judging by how much rock noise I would get driving down my street on first startup) but they still seemed to be holding strong with good tread depth when I put the car away for winter.
10k seems very attainable, 15-20k maybe not out of the question with no track time. I’m actually very impressed givin the 60 treadwear rating, I’ve had 220 rated tires last less than these.