Early doors, but independent observers (Quentin Letts apart) seem to think that Corbyn has won the last two PMQs. But they are small victories and there is a long time before the next election. At any rate, Corbyn is doing better than Miliband, who was very poor as Opposition leader.
For me the jury is still out as to his long term effectiveness, but for now, the change in style is welcomed. It appears like a more grown up politics, and scenes like yesterday of the baying loons on the Tory benches trying to drown him out will only help him. I am sure Cameron and hs troops will adapt, but they will have to raise their game.