from Cameron Wurf's blog:
"As often happens in cycling the riders quickly formed an agreement to make everyone happy and all stay together up and over the first pass and down the potentially cold and snowy decent before going hell for leather up the col d telegraphe and infamous galibier to the finish. This way the race went ahead as planned and all the riders were satisfied that they would be safe on this particular potentially risky part of the course. So how is this controlled? Well basically once the accord is struck up with the race leader I guess having the biggest say you would have to be a bit of a donkey to go against the wishes of the masses. The cycling world is small and it would surely bite you on the **** pretty hard if you did. So along with vincenso nibali some more senior and respected riders such as luca paolini, christian knees and our very own fabio sabatini set up shop on the front row and controlled the pace and also made it very clear that disobedience would not be tolerated. Being the end of the 2nd week of the giro is perhaps an easier time to police such a blockade as everyone is tired, everyone is sick of getting wet and cold, and I reckon everybody enjoyed the 60km or so of extra tranquillity in what's been as absolutely out of control unpredictable giro so far!
So all was going well with the agreement until the final km of the first climb where it was apparent that the road and conditions were no where near as dangerous or atrocious as was anticipated. At this point a few guys took off against the will of the bunch including the eventual stage winner gianni visconti. Its was perhaps a bit of a sneaky move but in reality a race is a race and if those particular guys wanted to break the accord then all the power to them. The peleton also ultimately has the ultimate say as we have 100+ strong dudes to pull if back if we want but it was let go and in the end gianni truly did an incredible job to hold onto the lead and win the stage."