In the end, as good as the WI have played (bowled intelligently, fielded well and have batted beautifully), the SA have made their own bed as far as I'm concerned.
If there ever needed to be more evidence that Smith's captaincy, and the SA team in general, are overly-defensive to their own deteriment its this match. On such a flat and even batting track with a long batting line-up they batted far too defensively from the get-go. Firstly they paid the bowlers too much respect, even before Smith went out. Smith looked like he was going to up the ante, but once he fell SA hit a wall. Sending Kallis before Gibbs was downright stupid. 4 is perfect for Kallis, and this track was the right one for Gibbs (as he showed). Gibbs thrives on tracks with even bounce. Kallis kamikazed because he knew he needed to up the run rate, whereas they should have stuck with their original order.
And don't get me started regarding Smith taking out his first slip after around 8-10 overs. Disgraceful. No matter how good Gayle and Shiv are going, when you have a bowling line-up of Pollock, Ntini and Nel you back them to be able to find the edge. Gayle and Shiv being left-handed were intentionally trying to counter the angle (well, mainly Shiv by moving across), so instead Smith takes away the slips making it even easier.
Smith's really showing as every game goes by that he's a fairly ordinary captain at best. Well done to WI though, hammering SA into submission.