i'm always a bit dubious when somebody like nibali starts to make huge gains in an area that he is not well know for and that is TT's - even tho yesterdays tt was uphill, it still takes a huge amount of sustained effort to do a TT and nibali always used to be more of an explosive type of rider, rather than a rider that can sustain huge efforts over long distanceWhilst I wouldn't bet my house on it, my gut feeling is that Nibali is clean. OK he looked very strong in yesterday's TT but it's not like he's been beating TT specialists on flat courses and blasting away from climbers in the mountains like Dirty Bertie when he was eating his special beef.
i hope i'm wrong in this case, because nibali, froome, wiggo etc makes for a good tdf to come