My and Flip won nearly every t2 scenario we Q'd for last night, but it was probably just my awesome meatshield skillz.
Its not that most destro players are horrible at their classes (although when they are, they are really really horrible), they just prefer to stand in one spot and farm lolarpees the entire time, they could care less about completing the objectives. This is why Mythic should implement some sort of renown bonus for those individuals who are actually trying to win the scenario.