People are going to copy other people be it the items they use or the words they say.
Taste is subjective is just a safe quote. When i read a review I want to know about the overall quality of a liquid , if the reviewer says there is any attribute to it they don't like. Im still in the process of selecting a few bottles from a few sites , I do use reviews and forums such as this as a guide otherwise it would just be a shot in the dark. Many companies out there and trying to narrow it down helps especially from people who have already done the hard yards.
I all seriousness, reviews are useful. You see, even though taste is subjective, the flavor should not be. If a reviewer I trust tells me that a certain juice tastes like a fresh strawberry--or like a candy lifesaver strawberry--that's helpful. Or if the juice is very sweet, sour, bitter. Whether I'm going to like it is another matter.