Yeah a CSD mate of mine on Euro Fleet LHR reckons alot of the B767 are now destined to long haul duties.
He's licenced on the Airbus, 757 & 767 fleet but says he hardly ever sees the 767 now. So I guess from that alone the 767's appear to be migrating to warmer climes, mainly Africa, Middle East, North America & Caribbean.
Infact I flew on them recently to Tanzania & thought they looked pretty clean & well presented, although the cabin crew didn't seem so keen about them.