With regard to "extract twang", personal tastes, and taste in general:
I used to teach "baby bio" (first semester biology) at KU, and most of the students in the class weren't biology majors. Most were simply trying to satisfy the General Education Requirement of a "science" for their bachelor's degrees. I wasn't interested in trying to
make them into "scientists". BUT... I did want to pass on to them a few things about science in general and biology in particular that they could use throughout their lives. One of the demonstrations I would conduct was directed at showing how genetic differences can manifest themselves physically. In other words, "see" genetics. Most of 'you' have at one point or another in school talked about "free" earlobes vs "attached" earlobes, or "hitch-hikers thumb". Some may have even taken a "taster" vs "non-taster" test.
For those unfamiliar with this particular example of different sensory abilities that are genetically determined, it is very simple: Cardboard strips are soaked in a chemical called phenylthiocarbamide, or PTC for short. That cardboard strip (about the sized of a paper matchstick), is placed on the tongue. While there are a
few people that just have
some taste, most folks fall into one of two groups: the "THAT TASTES LIKE HELL!" group, or the "I can't taste a thing but cardboard" group. It's an interesting classroom demonstration because the response of the "tasters" is usually highly entertaining.
Since most of my pupils were just coming to the reproductive part of their lives, after the test showed who was and wasn't a "taster", I would say the following: "So for those of you that can't taste anything but cardboard, remember this exercise when you put some food in your baby's mouth and they spit it violently in your face. It probably tastes significantly different to them than it does to you."
And so it is with beer. And Wine. And a whole slew of different things we put in our mouths. "Twangers" and "non-Twangers" alike might do well to keep that in mind as they consider asserting the "rightness" or "wrongness" of someone else's gustatory preferences. As it turns out, I am what is referred to (since about 1990), a "supertaster". I have LOTS of "bitter" taste buds, and few "sweet" taste buds. That means that I am very sensitive to (
HATE) bitter, and am relatively insensitive to (
LOVE) "sweet". That in turn means I don't like the taste of hops, and like my drinks sweeter 'than the average bear'. I'm too old to give a tinker's damn what someone else thinks about my preferences in the taste of beer, (or anything else for that matter), but keeping in mind that other folks may actually taste things DIFFERENTLY as a result of their BIOLOGY,
might prevent a stupid internet argument or two. (My hopes are actually pretty low in that regard, though.)
Here's a reasonably good read on the subject of "tasters and non-tasters".
http://www.livescience.com/17190-supertaster-nontaster-tongue-evolution.html
Paul
PS - I "searched" (not exhaustively) for threads on this subject, but did not find any. If I missed them, and this subject has been covered
ad nauseam, my apologies.