I've seen several different version of this flying around, Wrath of the Lich King "leaked" information from "data mining" an alpha client. But if you look at them a bit closer you will find old acquaintances like Titan's Grip, a warrior ability that allows two-handed weapons to be dual-wielded. That was a notorious part of a previous hoax "leak". So in my opinion all of this information flying around is fake, just created to make fun of the gullible. Don't believe anything you hear until there is at least an open beta. Hoaxers love to fake alpha information just because nobody has access to it, so it can't be verified.
The only reliable information we have right now is that the alpha started on May 1st. Which would be in line with a possible christmas release. Now Blizzard is notorious for not giving a damn about release dates. But if Age of Conan really achieves its sales target of 700,000, and thus sell much better than Lord of the Rings Online a year earlier, that would be less an indication of AoC being better than LotRO, but more a proof that people are getting more and more bored with World of Warcraft. If Warhammer Online comes out for christmas and Wrath of the Lich King was postponed into 2009, Blizzard would take a noticeable hit in revenue and profits. And in spite of their cherished image of the developers being in charge, even at Blizzard that is only true as long as they bring home the bacon. The long delays between expansions are starting to hurt Blizzard, and sooner or later a guy in a suit will start kicking some ass.