here is the interview from a belgium site: http://www.9lives.be/games/elder-scrolls-v-skyrim/specials/elder-scrolls-v-skyrim-interview
and this is the google translation of it:
Is there an idea to add werewolves into the game as dlc?
Maybe so, yes. We currently have no werewolves in the game, but it's definitely something to think about. What we do have in the game, are vampires. How progressive you will play the vampire, the more people will begin to attack you in cities. Also, the vampire is much weaker during the daylight.
so there you have, there are no werewolf in the game and it looks like they just removed them to add them as dlc later in the game.