Well, we obviously use the same SI equipment so it's probably difference in perception: glass is half-full or half-empty type of thing.I've been using Kentucky Applewood, Peachwood, Cherrywood; Hawaiian Pineapple, and Pomegranate in my Volt cartos for over a year, now. In the last 6 months I've added Cinnamon Rolls and KY4. They all perform exceptionally well with my Volt equipment.
I agree that with freshly charged battery and new cartomizer Vermilion River juice performs fairly well (maybe even great; but I still think/feel that it would benefit from a slightly higher voltage). But when a carto has been refilled 10+ times (being cheap is not a crime, right? ) and battery is not so fresh - in these conditions I can clearly see the difference compared to thinner (read SI, for example) e-liquids.