That's a very good point. Even if a smoker cuts down on volume and smokes less of each cigarette than before, the first puff will always carry the same blast of

That's a very good point. Even if a smoker cuts down on volume and smokes less of each cigarette than before, the first puff will always carry the same blast of nicotine. E-cigs also give you something to do that takes up roughly the same amount of time as regular smokes, which is probably one of the biggest behavioral barriers to longtime smokers.