In reply to martin09:
As Ian says, I'd be extremely surprised if anyone abbed from the summit for Pilier Sud or any of the >500m routes
As far as I know the ab from the summit is used to access routes like L'Odyssée (brilliant route), L'Illiade & Ulysse
The ab is great except when you get your ropes jammed on the 3rd one and you realise you have only 14 quickdraws, no trad gear and no phone...
Post edited at 15:11