Over at Stand Firm in Faith there is a thread about Sarah Palin that has evolved in to a thread about social class in America. This reminded me of the interactive graphics from the 2005 New York Times series.
Stand Firm in Faith is a blog that appeals to a highly educated and affluent community according to QuantCast.
The New York Times interactive graphic on How Social Class Works is here. We can see that 68% of Stand Firm readers have bachelors degrees or more and are thus in the top 20% in education. And 58% have incomes of $60,000 or more and are thus in the top 20% on income. We don't get information from Quantcast about occupation or wealth, the other two measurements on the New York Times Interactive Graphic. But if the occupation and wealth tracks with education and income, about 60% of Stand Firm readers are in the top quintile.
The NYT graphic is from 2005 and I am not sure if the income numbers are applicable to today.