Last Saturday, I was listening to Public Radios "This American Life," whose topic was "The Allure of the Mean Friend." In their survey of nice vs mean, they provided anecdotal evidence of mean gets ahead: A waitress who was always trying to please with an engaging personality was dying on the vein from the paucity of tips. She was so discouraged and depressed, she once came to work with a I-could-care-less attitude. Guess what? Her tips improved.
To test this theory, they visited the Lula Café. Again, Jekyll won over Hyde. This program segment is available by streaming audio linked below.