NOW the question is if everyone gets a mislabeled cart like lets say peanut butter carto with grapefruit liquid.... does the majority rule out subjectivity? or is it just a bunch of people with the same subjective taste, because one thinks it tastes like redbullz?
I think you'll find a substantial number believe it tastes like peanut butter, because their brain has been impressed with that notion.
Remember, there is NO "peanut butter" taste-bud. There's sweet, sour, bitter, salty, and (arguably) savory - PERIOD. Every "taste" is created by the brain from those inputs. Smell, sight, sound, ... the other senses help pre-dispose the brain to weight those inputs according to experience.
And yes - that means there is no "redbull tastebud".

And that's why unknown white meats tend to "taste like chicken". The texture and appearance of the meat triggers a response in the brain that runs the software that first experienced that texture, appearance, smell, etc. Most commonly - that's chicken.
I suspect that's why cartos will taste different from day to day or hour to hour. If you roll the vapor across different receptors first, the brain weights that receptor more highly. Alas, that experiment is nearly impossible to establish a control for...