Right off the bat, the survey sounds bogus.By asking if you're a smoker straight up, you're eliminating anyone that was a smoker and quit, by any method. The best information they could get on e cigs, if indeed it enters the discussion, would be dual users or people that tried them and went back to smoking. It will be interesting to see the results of their "study".
If it has any information or statistics on e cigs, they should have started by asking if you smoked sometime, say, in the last 8 years. Now you've basically captured anyone who used e cigs. Now you can start getting a picture, with the right questions, of how successful smoking cessation is using e cigs.
The other thing I find interesting is the fact that they asked specifically about smoking, not tobacco use or for that matter tobacco or e cig use. As much as they use smoking and tobacco as interchangeable when they're spewing their propaganda, they were very specific about smoking and dropping you when you said you didn't smoke, even though the title of the study is, " Evaluation of the National Tobacco Prevention and Control Public Education Screening Questionnaire."