Thanks for the reply but I didnt ask about that. I am a werewolf but I do not know how much time devour actually gives 'cause it seems like the time given is completely negated by the eating animation.Werewolf is only unlocked in the higher level zones through a quest line. The only people that really know a lot about it are the people who participated in the long term beta.
Probably best to look for some videos on the subject; probably going to be faster than waiting for comments this early.