They have literally done this exact double blind test many times and shown that for the majority of people, this simply isn't true. And for the ones who can tell a slight difference, it is only on the first drink, if taken neat, when their taste buds are sharpest, and if they're comparing a top shelf to the absolute lowest of the low quality. After one vodka, or if the vodka is mixed with anything at all, or if it's served cold, or if you're comparing to more middling brands...the results are the same as it would be with random guessing. I've drunk about 9 million gallons of vodka in my life, and I would absolutely agree. Get yourself a $15 bottle of vodka. It's just as good and you'll save a lot of money. I'm telling you with certainty that I could I could tell the difference on my 1st, 3rd, or 18th drink. While I'm eating an italian beef. I will admit that I could only do this when comparing top shelf to bottom shelf, though. I'm not going to claim that I can tell the difference between Belvidere and Grey Goose with 100% accuracy. This is a graph plotting vodka ratings (again, blind tests by an array of professional tasters) against the corresponding prices: http://i531.photobucket.com/albums/dd358/Cloudstrife219/vodka_quality_b_zpsw2ly0uuy.png That's zero correlation. There is, as you say, a "spectrum of quality", but it has no positive correlation with cost whatsoever. $10, $60, doesn't matter.