Inflation is certainly low and stable and, measured in unemployment and labour-market slack, the economy has made a lot of progress. The pace of growth is disappointingly slow, mostly because productivity growth has been very slow, which is not really something amenable to monetary policy. It comes from changes in technology, changes in worker skills and a variety of other things, but not monetary policy, in particular.
Ben BernankeOver the years, the U.S. economy has shown a remarkable ability to absorb shocks of all kinds, to recover, and to continue to grow.
Ben Bernanke