The very next line of the piece you link to says that all of this "speculation", and some very vague stuff about links to ancient druids doesn't mean they're NOT extradimensional. It could mean that the Scythe of Elune has been used before; it could mean that they originated in Kalimdor as druids but had to be sealed away in another dimension after going crazy. The few bits of new lore that've trickled in aren't a good reason just to chuck away the lore that already talks of extradimensional Worgen.

Calm down. Blizzard has performed a bit of a retcon here. Until NOW, Worgen have ALWAYS been said to have come from another dimension. Read ANY piece of lore-related writing about them - OTHER than that paragraph that everyone seems to love quoting - and you'll see that lore dictated that Worgen were, in fact, from another dimesion.

I use the term "retcon" loosely here because A)I don't think the word and what it implies (that Blizzard has no control over the story THEY WROTE about a universe THEY CREATED) and B)It's not reeeally retcon'd. The origin of the Worgen has always been steeped in a bit of a mystery. The only thing that is for sure known is that they were from SOMEWHERE. Or even some"when". The way it's looking, and this has been implied before, is that the Worgen were in cahoots with the Night Elf druids a looooong time ago and are linked to the elves in some way. They possibly could even be linked to the Emerald Dream, being corrupted alongside it, becoming bloodthirtsy and savage. hey may not have been summoned from another dimension, but from another time, making a sort of horrible time paradox/loop thing.

What I'm TRYING to say is for you and everyone else who INSISTS on quoting Blizzard's Worgen page, smug and certain you've caught WoW.com in a lie/mistake, do your research. The origins of the Worgen have always been shady and, until now, was believed to be another dimension.

"What mattered was that the worgen heard and understood me. By further channeling the energy of the Scythe, the barriers weakened more, and I was able to draw the worgen into our world. A score and a half I was able to summon in my first attempt."

http://www.wowwiki.com/Velinde%27s_Journal

"The worgen's home is a dark place, a place of nightmare. If that world fosters locations safe from the cursed Worgen, then my research has revealed no such bastions. And if one considers the ferocity and wickedness of the Worgen, it is likely that no such bastions exist. It is surmised that the Worgen are content to remain on their world, for although some Worgen possess powerful magic, they have made no attempts to reach Azeroth of their own accord. And for this, we are fortunate. "

http://www.wowwiki.com/The_Book_of_Ur

Blizzard lore is whatever they decide to make up at the time. They pretty much just ignore it, decide "Werewolves would be cool, we can put them here" and then bend the lore to fit that.

Well, there's been established two different types of worgen, even if they turn out to be the same with some more evidence, as both are mysterious. One type is simply the blood thirsty beast men from another dimension/planet. Those are the worgen you see in Duskwood and Tirisfal Glades and that were summoned by the Scythe of Elune. Though it is mentioned they could be summoned from some"when" rather then somewhere, so they may be from Duskwood/Gilneas/Tirisfal from the future? That's making my brain hurt.

The other type are humans who were cursed, or chose to become, worgen. The first example has been in since the beginning of the game. The citizens of Pyrewood village were cursed by Arugal to turn into worgen, though they cannot control it and turn during the night (although it appears the Gilneas worgen can't control it until they drink a faulty cure). The other type is the Wolfcult in Grizzly Hills who voluntarily take the curse from the resurrected Arugal and do have control over turning into a worgen.