I think it's difficult to say, because we have many different types of products, and generations of products; but the answer is, to date, that conversion rate is very low. We see a very small fraction of young people who try e-cigarettes go on to use them with any frequency. That is not to say that these products can't be addictive. The design of these things is rapidly changing, and the elements that may make them an effective replacement, substitute, or cessation product for smokers, may well make them more appealing for youth to try in the long term. It's not to minimize the risk at all. It's just that we haven't seen much conversion to date.
On November 4th, 2014. See this statement in context.