Official Blizzard Quote:
Death Knight
Frost
Icy Talons now increases melee attack speed by 45% (up from 30%).
Unholy
Unholy Might now increases Strength by 35% (up from 25%).
Hunter
General
Aspect of the Hawk now increases ranged attack power by 35% (up from 25%).
Talents
Aspect of the Iron Hawk now increases ranged attack power by 35% (up from 25%).
Shaman
Elemental
Elemental Focus now increases spell damage done by 20% (up from 15%).