Went with 7. Decent enough race for me. I lost all major expectations for this season a couple rounds ago and have enjoyed the races more since then.
As for the tires lasting longer than Pirelli expected. I think its more a case of the teams getting on top of this rubber. They know how it needs to be driven and instruct their drivers with that in mind.
If you push too hard on the Pirelli's, they will fall to pieces. If your gentle, they will last. Lewis almost ran into trouble when he reeled off a couple fastest laps and then had to reign it in. And it seemed most drivers were holding something in reserve all the way to the final lap as a host of guys posted their fastest laps of the race, which indicates to me that they're always wary of "the cliff".