Yes, I know lycanthropy and vampirism are already in the game. Their perk trees are not. Since your answer is based on a teaser trailer, I'm going to declare it to be conjecture. There are no other perks in the game that are gained without skills and I don't see why this will be any different.
Yea... they have shown it in all the dawnguard videos...
which by the way there are five now
NOT just a teaser trailer, I based what I was saying on the Gametrailers Gameplay preview.
Heck you are telling me I haven't seen them use it.... when I have screenshots of the perk tree I am referring to in my sig :/ when one of the screenshots is of a werewolf GETTING one of those perks...
haven't been keeping up with E3 have you?