Moving on from that, I think it was Hinault that was saying, that none of the GC riders or teams attack from a long way out any more. Porte for instance was feeling good yesterday, yet attacked with 2km to go, he could have been a clear second or better had he gone much sooner.
I know it's slightly different now as you rarely had whole teams riding in support of their GC hope back in the day, and large quantities of EPO made it a bit easier, but no one attacks Pantani style on the 2nd of 4 climbs etc. Everyone sits marking each other until so far up that last climb.