I've just done 5,000km with one of the new Michelin City Grip tyres on the rear wheel. It performed flawlessly. It's not the grippiest of tyres, but just as good as the Gold Standard or Pilot City. The important bit was the grip in the wet, which was excellent. i never felt a rear-wheel twitch except when the surface was a bit greasy - and any tyre would give that much feedback, and most might slide a lot more.
The wear (or lack of wear!) is astonishing. Apart from about 500km of more gentle pace, 4,500km was at the best speed achievable for the road conditions, and there has been almost no centre-line wear.