Forever The Best said:
Fuente De, Formigal, Risoul and Val Martello changed an entire GT. Guardiagrele and Solaison succeeded as well. Only Nice and Galibier failed. (And Nice was extremely close to succeeding and would have if not for Bahrain working pointlessly for a 4th place on the stage.) And Contador went for the stage at Cordal descent and took it.
Or Aprica 2010, but since Aprica is a easy climb and Mortirolo is very hard it is pretty different from the others.
Or many riders forming a huge break at L'Aquila 2010. Arroyo got a 2nd place because of that.
Fuente De worked
Formigal - the beneficiary was Quintana, but it wasn't his tactic
Guariagerle needed a 30% climb
Solaison was won by an attack on the final climb
Risoul (which one?). Val Martello I missed
Anyway, these are exceptions. Last gasp efforts. In the meantime waiting for the final climb has a far superior success rate as a tactic.