JRod, Contador, Quintana and Valverde are all punchy riders and do reasonably well on high tempo long drags, but those sort of climbs are where SKY and Brad are really strong. Keeping a high wattage speed over such a long time just drives those other guys into the floor meaning they cant explode out. It's a fairly effective tactic, but doesn't always work, and the best way to counter it is to do what Dan Martin did and hit out early with vigour. The problem that some of the teams seem to be having with the SKY tactic is that they do leave it too late, and by then have lost most of their domestiques and energy.
I've been quite impressed by Brad, he certainly seems up for it right now, and is putting some attacks in not just sitting in the bunch, but mixing it up. The attack on the descent the other day was just inspired, and he had a really good dig on stage 3, which just destroyed the peloton (apart from the usual suspects).
Both the Giro and the Tour should be really good this year