Yea, I am actually looking forward to that stage immensely...but of course, my favorite race is P-R. I think Lance will take some time there. Not enough, but I am betting that Contador will end up in the wrong split and maybe not the first wrong split, but one even further back. Honestly, he doesn't seem to like the front of the race until there are very few climbers left on a mountain. You'd better be willing to hammer like a madman before entering the cobbles, and you can rely on your team to some extent, but you'd better be a bull yourself. I just don't see Contador having that instinct, but time will tell. Lance on the other hand, I don't see him having the same problem. Obviously, P-R isn't something he has any experience with, but he is not afraid to get to the front when he needs to.
I don't however think it will gain him enough time that he will win. He will just make one of the mountain stages more interesting because Contador will have to drop him, and drop him good.