I have tasted most of my collection, including eating some D.capensis flowers scapes and the nectar or dew of just about every other CP I own, all the dew and nectar tastes pretty good- Nep drool, to me, tasted like glycerine, kinda, and as I can't recall who said it, kinda made my tongue numb, too
The flower scapes didn't taste like anything really, but they weren't bitter or anything, I think they would be fine as a garnish for salad in the summertime if they're not too poisonous or anything (I asked a bunch of folks before I actually tasted them, being hospitalized by D.capensis would be WAY too embarassing)