Imagine that such pictures are tenuous extrapolations. Consider that single workers each count as a separate household, and likely have lower income than most families. The low end gets weighted with these, so that average is probably a good deal different from the average income of households that are "supporting a family". Not trying to argue how good or bad the economy's fundamentals are, but that statistic doesn't translate to the picture you're trying to paint.
In 2007, the average annual household income rose 1.3% to $50,233.00 according to the Census Bureau. Imagine making 50K a year and supporting a family in this economy.