Bashiok posted late last night on the US forums, highlighting a change in the recent patch 5.2 notes. The addition is as follows:
Bashiok adds to his post, explaining how, in Mists, Blizzard is essentially trying to strike a happy medium between previous expansions' attitudes to gear progression. Cataclysm's gearing model devalued old content progression too quickly, allowing players to effectively jump straight into the current raids, while previous expansions had been criticized for their linearity.
Mists retains an element of that linear nature, with Bashiok saying that new characters will have to go through Mogushan Vaults, Heart of Fear and Terrace of Endless Spring, but that drop rates will be increased and the content made easier. He does note, however, that this 10% nerf is currently slated as a one-time reduction, rather than step one of a set of progressive nerfs.
What do you think of this? Hit the break for Bashiok's full post, explaining the philosophy behind the changes.