In a PDF, Emmanuel Saez of UC Berkeley writes:
From 2009 to 2012, average real income per family grew modestly by 6.0% (Table 1). Most of the gains happened in the last year when average incomes grew by 4.6% from 2011 to 2012.
However, the gains were very uneven. Top 1% incomes grew by 31.4% while bottom 99% incomes grew only by 0.4% from 2009 to 2012. Hence, the top 1% captured 95% of the income gains in the first three years of the recovery. From 2009 to 2010, top 1% grew fast and then stagnated from 2010 to 2011. Bottom 99% stagnated both from 2009 to 2010 and from 2010 to 2011. In 2012, top 1% incomes increased sharply by 19.6% while bottom 99% incomes grew only by 1.0%. In sum, top 1% incomes are close to full recovery while bottom 99% incomes have hardly started to recover.
And the gap between the 1% and the 99% is now the widest it's been since the 1920s, according to the AP.