It's amazing how much our perceptions can be manipulated by external factors. Did you know that in blind taste tests, where BOTH options are the exact same food, people are much more likely to pick the one on thier dominant side than the other? IOW, with the same exact food on both sides, right handers pick the one on their right, and left handers pick the one on their left.
I remember back when I was at riV4L, we had a batch of Pina Colada where they got the sticker color wrong. THe juice was the exact same, but because the sticker color changed dozens and dozens fo customers complained that it didn't taste as good anymore.