1-1.5k from a rear on a superbike isnt uncommon if riden hard on the road.
My 1st R1 with properly set up suspension running 38psi rear and 34psi front would demolish a rear tyre in less than 1k and a front in just over 1k, and im a smooth rider, not aggressive and very conservative of tyre life due to the cost. Alot of people are getting 3-6k from a rear on big bikes, but they are generaly running harder tyres or not riding as hard on the road.

Gav