Originally Posted by
zomgDPS
Having played all 3 specs extensively on beta in a whole host of situations (Arenas, BGs, Leveling, Heroics, Challenge modes, Raids etc). I can say that this is pretty much completely accurate.
All three specs 'perform' almost the same on paper (simcraft) but in reality, Frost is just overwhelmingly more versatile, dynamic and fun than the other two.
It has excellent mobility, excellent burst, excellent cooldowns (and more of them too), excellent AoE (esp due to Frost Orb) and excellent synergies with the rest of the mage spells/talents. It is also hands down the most 'fun'.
The Frost spec will, mark my words, completely Dominate MoP in almost all aspects of play. It was designed from the ground up to do so.