I think people are a bit overreacting with this "leave the tour" stuff. Of course the situation is extremely bad and I'm also sad right now but I still see it very differently than many others here.
Yeah, Contador lost 47 seconds today, thats bad and you definitely shouldn't loose so much time in a tour when the mountains haven't even started yet. But 47 seconds sound more than it is. In the last 25 tdf editions (probably even more but I didn't look any further back) there was one single race which was decided by less than 47 seconds, and even races which today are seen as very close like 2011 or 2006 were decided by more. If he doesn't win the tdf, it's very unlikely it is because of the time loss of today. The reason why we should be worried is because he dropped on such an easy climb, but we have an excuse. He crashed, it's not like his shape is generally horrible (might also be the case but we don't know) but you guys are already talking about giving up. In the giro last year he also had a crash and a small injury and there was exactly the same discussion and the same people said he should abandon because he won't win the giro anyway. Now we should at least wait for stage 5 and if he loses minutes, we can assume the tour is lost he should maybe focus on the Vuelta instead. But maybe he can recover from his injury, since we still don't know what exactly is the problem, and I find it rather unlikely it still affects him as badly as today if there are no fractures, because if I understood everything correctly it was the pain which was the problem, and not that he couldn't strain his body.