Official Blizzard Quote:
One could be designing a StarCraft tech tree page with the next Diablo 3 class announcement creeping around the corner while babysitting a World of Warcraft article detailing the newest dungeon, ready to go for live deployment within the next hour. Juggling three universes at once is ambitious but never has you bored at any time.
Of course, most of us were counting on the fifth class being announced, anyway, but it never hurts to be more sure!
Gratitude goes to Akuma_Gin for his incredibly off-the-wall, randomly amazing find. Please see here for the discussion thread.