1) John Cleese served wine in opaque tumblers to a group of friends of his at a party. He asked people to taste it and tell him if they thought they were drinking red or white wine. About half of the group got it wrong. I immediately thought about how many people I know that say, "I only drink reds!".
Calvin Trillin discusses this experiment in his Feeding a Yen
, Random House, 2003 in a chapter entitled "The Red and the White" (pp. 116- 128 ). He concludes that the test that supposedly was developed at UC Davis never occurred, but that in his informal test, his friends had some ability to distinguish between red and white wines.