Anything that causes people to spend more time thinking about what they do will clearly have an impact on productivity. The good news is this is not a permanent situation -- these things have a way of clearing themselves up. But will it be completely inconsequential? I don't think so.
These numbers are essentially telling us that retail sales were artificially boosted by zero-percent financing. These numbers are not going to do anything to discourage the Fed from thinking that the balance of risk in the economy is toward weakness.