I got 13,600 miles from my front PR3. (46,600 miles on the bike)
The first rear lasted about 7,000 miles but was worn out in the centre.
Am part way through the second which seems to be lasting better as I now alternate what used to be an all motorway commute with some twisties.
I guess at the current rate the 2nd rear might go 10,000 miles.
One of the unexpected benefits of this tyre was that until it hit the wear bars the front felt almost like new.
Once it hit the wear bars it started to feel nervous, which is perfect.
Have a new PR3 on the front now.
Until something better comes along I'll stick with them.