I was pleased with Stones on the whole, as well, but for me he definitely contributed there as the Sunderland player was already being closed down and stepping forward just gave the lane to pass in (albeit between the legs). But Kolarov did start it all, before Delph inexplicably decided to step centre circle side of the next Sunderland player allowing him to turn on goal, feeding whoever it was that put in the ball for Defoe, when Sagna was caught in two minds letting Defoe touch the ball forward nearly unhindered.
I think we generally agree... Aside from your post about Aguero holding up the ball well, that is. ;-)