His rise out of nowhere was the anomaly......but he hasn't really massively oddly improved since his arrival really, he'd be a two time Grand Tour winner if he was leader from when he started at Sky, and saying that, had he won them two tours, I think he would of went for the Giro-Tour double this year, could of held all 3 in little over 18 months.....can't see him attempting the Vuelta again now he's undisputed leader pretty much.
But yeah, always wary with cycling unfortunately. Though some like Cavandish, I'm like 99% certain he's just that damn good.