I just started watching them play this RWC and I have to agree. That game against England was brutal. I would definitely say they have a good chance at the cup.
Boks are looking good. The main thing for me is their composure. du Preez is a great reader of the game and really can control a game and guide it towards the way the springboks want to play. They are possibly a less spectacular outfit than NZ, and a little less creative, but so well organised and physical.