After buying an e-cig, I never bought another pack of cigarettes. It has been roughly six weeks, I think. My consumption was slightly higher than yours.
Congratulations, by the way. You have successfully added years to your life, ceased to constantly stink, saved a lot of money, and retained the mental edge and social benefits of smoking nicotine. Instrumental rationality at its finest.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.