According to the household survey, part-time employment accounted for about two-thirds of the jobs created in July. So far in 2013, part-time employment accounts for 77% of net job creation (note: 20% of all jobs were part time at the beginning of the year). Since the start of the recession in December 2007, the economy has lost 5.5 million full-time jobs while adding about 3.5 million part-time jobs. The relative importance of part-time employment helps to explain why total hours worked declined in July even though employment increased (note: this isn't the average work week, but an estimate of total hours worked throughout the economy).
Many economists have been trying to reconcile the relatively weak estimates for economic growth with the comparably stronger numbers for employment. The underlying details of the employment report suggest that both measures of the state of the economy reveal an economy growing modestly (to use the Fed's latest description).