I'm asking because I don't know (usually in the Folding & Singlespeed forum but here for the TDF).

Why are mountains the element which separates the men from the boys? Is it because drafting (echelons and pacelines) doesn't apply here and teamwork is less a factor?

If a rider is a strong sprinter (meaning he has great power) why can't he perform well in the mountains as well?

Lastly, what makes a good climber?