I think 9 ascents of Box Hill will be reasonably selective. Its not the hardest climb in the world, but it will certainly give opportunities to anybody who wants to put the likes of Cav under pressure. The last 30 mile run in could be pretty exciting if it involves the British lead out train chasing down an elite attack group.
the key is how far is Box Hill of the finish
Cavendish wasn't dropped, but the French team reckon he'd gone into the red to stay with the group on the final ascent.