This is an interesting thread - thanks.
I think it speaks more to the generally good nature of people that they would rather leave a good review on a juice they enjoyed than a bad review of one they didn't. I don't think it's out of fear of retribution from a vendor for most people, as one post suggested. I've done the same thing as others have mentioned for the most part. Reviewed some I've really enjoyed, brushed off the mediocre, and deliberately not reviewed the ones I truly disliked.
This thread made me realize I should review more evenly. I read the reviews and I hope I'm getting a sampling of the people who have tried it. It's really kind of hypocritical then for me not to honestly remark on an array of my experiences, not just the great ones.
Another point this thread made that I found interesting was the whole taste being subjective thing. Is it? Is it really? We may prefer some tastes over others, and that's subjective opinion. As the other post mentioned though, we know what coffee tastes like. Whether you like your coffee strong, black, sweet etc and how that coffee flavor matched up is the real question, no?
Maybe for complex juices it's more subjective. I don't know. Logically, for straight forward flavors anyway, since we all know what an orange tastes like, we should all agree if the juice hit that flavor or not and maybe talk about if it tasted like a very sweet orange, fresh orange or orange candy etc. Whatever is subjective about taste would be equalized by having tasted other oranges before. Or am I way off here?
It's a little intimidating to say that honestly, as "taste is subjective" is like a mantra here. Don't attack me, just thinking with my fingers!