Two bits from a good article from The Guardian on wine tasting:
More evidence that wine-tasting is influenced by context was provided by a 2008 study from Heriot-Watt University in Edinburgh. The team found that different music could boost tasters’ wine scores by 60%. Researchers discovered that a blast of Jimi Hendrix enhanced cabernet sauvignon while Kylie Minogue went well with chardonnay.
Colour affects our perceptions too. In 2001 Frédérick Brochet of the University of Bordeaux asked 54 wine experts to test two glasses of wine– one red, one white. Using the typical language of tasters, the panel described the red as "jammy' and commented on its crushed red fruit.
The critics failed to spot that both wines were from the same bottle. The only difference was that one had been coloured red with a flavourless dye.