Yeah, that was a new route on the same side of Johannesburg from a couple years ago. Jens and DBerdinka I think? Had some cool pictures.
The regular NE Buttress is just fine for mortals, and if you rap into the gully that leads onto the fabled snow rib rather than climbing the nasty chimney, the whole thing goes at about 5.0. Once you're on top, it's still a long ways down, so most folks are in for a night out somewhere on that outing. Highly recommended.