If the OP is trying to use McCormick Cherry Extract, mixed with some Humco Glycerin, I can tell that I'm making the same test right now (no nic) and tastes just like if I had dripped VG alone. No cherry flavor whatsoever. Tried on a standard 510 Cartomizer, a regular 510 atty and an LR 510 atty. Lots of vapor, AMAZING vapor, but no flavor at all. I got it up to 50% cherry extract and 50% Humco and there's nothing... not even a hint of cherry.
Maybe is Humco's fault, I don't know. But I even tried to drip the extract alone (since it says it has PG base) and it doesn't work... no vapor, it doesn't vape.
*goes back to dekang*