a lot of cricket left to be played and a lot can happen. It's no sure thing the Proteas will win, the way I see it the Proteas need to bat till tea today and score around 420 runs as a minimum. Time is going to play a huge factor, if the Proteas capitulate like they did in the first innings it might come back to haunt them as the Ozzies might have enough time batting at a steady pace to get to the Proteas total.
Quinton is going at almost a run a ball, I wish someone tells him it's not 20/20 cricket as there's no way any batsmen can sustain that sort of tempo on a tricky wicket. He and AB need to dig deep and suck up time, no loose and adventurous shots, only play at the poor deliveries would be my advice.