I've got 4k exactly out of my 020's, but in fairness I've done a trackday on them and I got a puncture on the way down to AR10 with a pillion and luggage and was riding with about 7psi so that ate a good portion of the tyre
I am staggered tbh just how quick the remaining tread on the centre of the tyre wore out.
But it's something I suppose I have to accept if you wanna take a pillion regularly and do some mway miles.