I don't understand how a good hill-climber (the other Schleck) can't do a time trial?
Surely being to pedal fast up a gert big hill is a similar physical output to pedalling on the flat as fast as you can.
Please explain.
it's a bit different. power/weight matters in mountains, flat out sustainable power matters more on TT, particularly an almost flat one like yesterday. And the Shreks work on accelerations on the hills rather than constant sustained power output (hence being able to drop Wiggo on gert big hill when they do go for it – but not being able to compete with him on the flat)