These are part of the first wave of results from the random survey of Americans who completed and mailed in a 16-page questionnaire. Conducted in the fall of 2005, the survey is a statistically representative sampling of the USA by age, gender and race.
Very interesting article. But I am a little skeptical of the "representativeness". What kind of people have the time and inclination to return a 16 page questionaire? So there might be selection bias? -raghu.
