In reply to Paul Manson:
I passed this thread on to a colleague (lives in Cham) who is a long-standing authority on French alpinism, an author and translator, and he climbed the Walker in 1962, the Dru N face in 1961.
I was surprised to hear him say that there has never been a definition, of any kind, however broad, of the 'Grand Course' climbs. They have changed with time, some were in, now out etc. Changes in skill, equipment, psychology etc have all been at play.
He, generously, I think, did note that to the amateur mountaineer the Vallot route on MB may indeed seem a 'Grand Course', though traditionally it may not have been considered one. Implicit in all his views, and in every other source I found, was that a Grand Course did involve some technical difficulty, and some length. His ascent of the Walker was the 18th, but 14 parties climbed the route that year and he felt that even then its status as a Grand Course had been somewhat dented by that. I think that gives some idea of what was, and maybe should be, involved with a climb considered a Grand Course.
Perhaps, like a number of other things in climbing, changes have also come about through increased commercialism, so it's sexier to sell something as a 'Grand Course' even though, traditionally, it may not have qualified as such. eg. the Gouter route.
Some people don't care about the importance of words and their definitions, though usually they're happy for them to be changeable because it suits their ignorance, apathy or commercial motives. Categories, definitions, words, are all debatable and changeable, and should be, to accommodate genuine progress, but they are the key to communication and understanding, and that remains as important as ever.
I'd like to think that climbing definitions changed because more climbers got better, not because the media got lazier or travel companies got cheekier.
D