Think that's pretty over the top mate. He's been nothing really special at City - in fact he's not really regained the form he showed at Arsenal and plenty of talk as to whether City want to keep him..
The strike, however, was unbelievable. He'd done basically nothing prior to that but the strike was enormous and, given the gravity of how much it meant to City, is hard to overestimate. Dare I say it had overtones of Gerrard's strike ten years ago. I can't see City replicating that - they've got too many problems in Europe but was still a truly amazing strike.