fitted EXPs on my 955i Tiger in January now covered 5000 miles and the rear is shot

-having had 2 sets of tourances from new ,I covered 22,000 miles,so these new ones are wearing twice as fast,

I do however think they are superior to the old ones - no problems wet or dry,but not twice as good...
I have replaced the rear as I'm off on a jaunt to France and Germany this weekend and have spoken to Pirelli/Metzelar customer services and submitted the tyre for examination by them to see if there is a problem with it?
I don't really expect anything from them,but if the current tyre only manages 5000 miles ,with the high mileage I do (18000 annually) it will be all change again- I'll keep you posted.
Any one else done some mileage on these tyres yet?