That is not in line with the blind taste tests I have seen. The vast majority of people not only can't pick out the more expensive wine, they also tend to prefer the cheaper wines.
Even wine-likers would be able to tell, but the vast majority of people don't know much about any given niche, by definition. It's like saying "80% of people surveyed couldn't tell the difference between an AE86 and an AE85 just by driving them". Duh but the difference is there and not hard to spot if you know what you're looking for. We need to stop conflating general unfamiliarity with impossibility to distinguish.
