I think t depends on how often you check the pressure and how you ride, as to the expected tire life, you'll get.
I was told by my local Dealership that I was somewhat of an exception because I have over 9000 miles on my rear tire. It's gotten to the point that I purchased a new tire and the old rear tire is getting thin in the middle. I don't do burn outs and check the tire pressure fairly regularly, advantages of having an air compressor in your garage. But that is just an idea of the mileage I am getting out of my stock set.
I am replacing my tires with the stock Dunlop’s D207s, because I like the way it handles and rides.
My front tire doesn't look as worn so I think I can get another few thousand out of it before I need to change it.
Hope this helps,