Ingredients in E-cigs haven't changed until now, so I'd say the credibility of that source hasn't changed. Also thanks for searching up the source I've mentioned. If you want some more input on this topic I could write a whole post about it because I learned so much about vaping since I've started.
Also many people argue, that the moisture from the e-cigs isn't good for your lungs, which is also BS, because your lungs are wet all the time and even if the liquids would add moisture to your lungs, they have several mechanisms to get rid of too much moisture. Thats something I heard many times, when arguing that vaping is a healthier alternative.