I think it was you Jeremy, over a year ago, getting VG nic from ECX thinner than usual and contacted them and they stated no water added, and you where pretty ...... about it(understandably!)
Sorry if remembering wrong, mate!
Besides summer or hotter weather, then there are differences in the VGs viscosities... I always add 5% water and no PG to final mixes, and depending on VG used, some mixes are definitely thicker or thinner, and needs more or less force to drip from my used plastic drip-bottle... Also, nic has close to same specific gravity as water(1.01 vs 1.0), so 100mg is almost like adding 10% water. Still, as my previous point about VG viscosity differences, then one of my 100mg VG nics have actually thicker viscosity than one of my VGs without nic, so it could be true that they don't add water, but of course can't be sure! If they do, then it's definitely ....ed-up to not disclose it when asked!
With 100mg nic though, then unless you use pretty high nic, then you shouldn't really have that much water in your mix... I used to
vape a nicbase with 20% water untill recently, and at 3mg it added 0.6% water or something and it was only 72mg nic...
About VT-TH, then Kevin stated on the other forum once, that he would stop selling it(or atleast so cheap), because it was happening at a loss for him when ordering liter bottles and not 120mls... He just underbid the market for gaining market-share and introducing his nic to the world so to speak, I would believe...
Edit: Jeremy, i'm sorry mate, it was cjb313 slightly over a year ago in this
thread and you afterwards talked to him about it, so in my head I remembered it as you where the one having the issue, sorry. Of course if it was you, then you wouldn't write such a post as you did now, so I feel so stupid for even thinking that, let alone writing it...