[NutCrackerBoy]

I couldn't find where to get raw data for GDP per capita, but I did find this in the source that Dr. Williams linked:

Today, the expenditures per person of the lowest-income one-fifth (or quintile) of households equal those of the median American household in the early 1970s, after adjusting for inflation. -Understanding Poverty in America (Backgrounder #1713) by Robert E. Rector and Kirk A. Johnson, Ph.D.

That strongly indicates to me that the figures were not mistaken.

[xzins]

Could be, but I'd like to crank the inflation numbers myself.