I'm having real problems in working out how a rider with generally poor stage racing and climbing results wins every stage race from the beginning of the year. Peaking multiple times a year or maintaining peak performance for months at a time is not normal.
You're being disingenuous. He didn't really switch his focus to road racing until 2009, riding mostly as a domestique or concentrating on the track until then, so you can't really consider his performances in those years as being meaningful indicators.
In 2009, when he shed 6kg of trackie muscle and really turned his attention fully to road racing for the first time, he finished 7th, 5th and 10th in three of the biggest mountain stages of the Tour de France, and came
fourth third overall. He had a stinker in 2010 but there are plenty of well-documented reasons to explain that. In 2011, he won the Dauphiné (making mincemeat of Evans in the process) and looked like a strong contender for the Tour until his crash.
An evaluation of his wins in 2012 also needs to take into account the absence of Contador and the relative performance of his other main rivals - Evans, Basso and Schleck were all major disappointments throughout the year. Hesjedal might have made life tougher for him in the Tour if he hadn't crashed out. The only real competition he had was Nibali, who suffered from having poor team support. There was no Joaquim Rodriguez either. He might have had more competition from BMC if they'd decided to back Tejay instead of Evans.
Not to mention the fact that he won Paris-Nice and the Tour de Romandie without being anything near his peak.
d.