It seems South African wines have the highest rate of corked wine in the world.
It also seems that South African consumers are not ready to accept screw-caps (and these are still associated with cheap or bad wine). The Vergelegen estate (recently named the best winery in the New World by Wine Enthusiast) tried to release their ultra-premium Sauvignon Blanc under srew cap, but had to switch back to cork after poor response from the public. Some restaurants even return any wine under screw cap...
Othering interesting bits from the article above:
- Only 15% of Kiwi wine is closed with natural cork.
- Domaine des Baumard is moving their entire production to screw cap.
Unrelated note: Domaine des Baumard's website seems to have been defaced at the time this was written.