This maybe completley unfounded so feel free to correct me.
last summer i was in chamonix satying at my freinds apt that had an amazing view of petit dru north west face, many questions were raised about the face.
as it seems a huge chunk of the face fell off a while back leaving the face with out any route in its prior condition therefor none of the old routes apply and the face left unclimbed.
(petit dru can be climbed by other routes but as far as im concerned those are a diffrent mountain all togther-see link)
to the best of my knowledge the new face is way thougher than the former.
and no successfull route was registerd,i also remember seeing one of those sender movies about two climbers from boulder who tried to send the first ascent proving unsucssesfull.
i cant recall their names its a soar subject later on in the series thay tried to climb a high peak in india thay dident come back from that.
http://www.summitpost.org/westface-of-t ... t-dru/3331