Blue post (http://forums.worldofwarcraft.com/thread.html?topicId=15198918444&pageNo=1&sid=1#11)
QuoteDual specialization isn't something everyone needs. It's a perk we're adding into the game, and it's initially going to require an investment. If you can't afford dual specializations for 10 different characters, you might not actually need all 10 of your characters to be able to swap between two specializations on a whim.
With a single 5-second, out of combat cast, players level 40 or higher will instantly be able to swap between two different talent specializations, glyph sets, and action bar set-ups from virtually anywhere in the world.
In other words, you didn't really think we would pass up the opportunity to put in yet another gold sink into this game did you?