The Fed is more willing to balance risks in favor of growth than it was two years ago. They really don't want to be accused of anti-growth. They want to be seen as anti-inflation, and I don't think in that light they wanted to be seen as moving ahead of inflation reports that have not shown any acceleration.
Quotes about anti-growth (2 Quotes)
President Obama instituted the most anti-growth, anti-investment, anti-jobs measures that we have seen in our lifetime. Now he called his agenda ambitious, I call it reckless.