Forbes magazine. I think, however, Rush is not clear on the difference between median and mean.
thanks
http://www.forbes.com/economy/2006/10/16/demographics-income-population-biz_cx_tvr_1017median.html
"The typical American household has a net worth of $465,970, up 83% from 1965, 60% from 1985 and 35% from 1995."
This is absolute rubbish.