I clicked the mages source for the information and it linked (suprise supries) to something resembling a blizzard post made on their site (unlike when we quote blizzard, which always links directly to the battlenet offical forums or other offical Blizzard site components).
As such the forces incharge of the site could have doctered, faked or manipulated the information to their ammusement.
If it was a genuine quote, then I am suprized that blizzard posters are posting spoiler information (preview of changes) on a third party site and not their own forums.