Bank of England Monetary Policy Committee member Adam Posen made a very interesting speech yesterday comparing the US and UK recoveries. Its well worth a read, or at the very least a quick look at the charts at the back.
Some of these charts are rather striking the UK recovery has been an awful lot weaker:

And this has manifested itself in both investment:

And in consumption:

What explains this widely different economic performances?
Equally critical to investment and to stockbuilding as sources of the US relative growth advantage, however, was the underlying growth that drove them.