Anyone who says it is a unusually boring way to win - have you been watching the tour recently? Last 3 years:
2011 schleck had no choice but to attack early - evans brought him back (enough), did the same to contador the next day, and smashed them in the TT. Exactly the same as Sky except Sky have more firepower.
2010 was very closely marked, hardly any attacks at all, in the end came down to misfortune of a dropped chain
2009 not really that much in it - pretty much it came down to the final day on ventoux apart from a couple of successful attacks by a proven doper.
Its been a long time since someone won it from a do or die mountain attack