a little less than two weeks
Why? Because I like it, that's why.
As has been pointed out many, many, MANY times, the portals in Shattrath, and later in Dalaran, were intended to connect people to the old world to access their auction houses and their class trainers. Now Shattrath and Dalaran have auction houses and class trainers, so the point behind portals is moot. But you people acting entitled to your perks, you're ranting, raving, saying "screw this, I quit", or other childish lunacy.
Cataclysm is due in now a little less than two weeks - and yet you people constantly find things to gripe about. They introduce worgen and all I've heard is people whine about how they look stupid, or (by the lore-minded people) how the Horde gets to continue the wow po worgen storylines in Silverpine and Gilneas, or wondering why they'll get sent all the way to Darnassus, or why they can't just get mounts like everyone else, yada yada friggin' yada. We get flight in the lower continents, something we've been after since BC introduced the concept of flying mounts in the first place, and all people whine about are their precious portals, not wanting to have to leave Dalaran because they've been there two years and it's inconvenient for them to change their routines.