Geert Leinders?
Of course his Vuelta 2011 was a big surprise, but what bugs me is that Sky was already interested in re-signing Froome before that race, and that he was designated as key domestique for Wiggins. It indicates they already knew he'd sooner or later have his breakthrough, and if it hadn't been that season it'd have been 2012.
Then he's either taking stuff he'll never get caught with, or he's really as clean as Sky claims he is.
For example, what's up with Santambrogio? When did he ever perform that well in the high mountains as in Tirreno and Trentino? You'll probably hear a lot of people saying he's always worked for others, and now with his free role he can suddenly climb extremely well. But I have some doubts about his progress this winter. Let's see what he does next month, and if he can ride for top 10 in the Giro classification.