Below is a list of helpful studies that you can use to corroborate your talking points when dealing with smokers who are not vapers.
http://www.mdpi.com/1660-4601/10/12/7272 (Downloadable PDF of the Impact of Flavour Variability)
http://informahealthcare.com/doi/abs/10.3109/08958... (Downloadable PDF - Toxicology study on vapor proves electronic cigarettes are much better than tobacco)
http://www.mdpi.com/1660-4601/11/4/4356 (Downloadable PDF - Switching from cigarettes to e-cigarettes has significant health benefits, according to a survey of more than 19,000 users)
http://www.nature.com/srep/2014/140226/srep04133/... (Downloadable PDF - Nicotine Abosprtion from Electronic Cigarette use between "First generation" (pre 2007) and Third Generation Devices)
http://publichealth.drexel.edu/~/media/Files/publi... (Downloadable PDF - Chemicals generally found in E-Cigarettes pose no health concerns)
http://ecigarettereviewed.com/wp-content/uploads/2... (Downloadable PDF - Dangers of over-regulating E-Cigarettes)
http://www.biomedcentral.com/1471-2458/14/18/abstr... (Downloadable PDF - No Concern for Bystanders of Second Hand Vapor)
http://www.biomedcentral.com/content/pdf/1471-2458... (Downloadable PDF - Effect of E-Cigarettes on smoking reduction and cessation)
http://goo.gl/LhEDoK (Downloadable PDF - Study that found of more than 2000 former smokers in this survey, 96% reported that the e-cigarette helped them to stop smoking.)
Many more studies exist, and more research can be found on various sites including this great collection: http://onvaping.com/the-ultimate-list-of-studies-...