2011 was a particularly brutal Giro year, while 2007 was quite easy. In 2007 Zoncolan was the last, of a few, climbing stages. And then it was just a short flat stage ending in the wall called Zoncolan. 2011 was nowhere like this. While the Zoncolan stage was made much easier, it still had a hard mountain stage the day before, and the hardest stage in the giro the next day.
It's really not completely comparable. That doesn't make Nibali's performance in 2007 believable of course...And not the ones in 2011 and 2010 either.
It's really not completely comparable. That doesn't make Nibali's performance in 2007 believable of course...And not the ones in 2011 and 2010 either.