Bill Gross, Janus Global Unconstrained Bond Fund portfolio manager, said Wednesday the Federal Reserve's decision to leave interest rates unchanged demonstrates the U.S. economy is on a steady, albeit slow, path toward normalization.

The bond guru, who was "hardly able to speak" after the Fed decided not to raise rates in September, said on CNBC's "Power Lunch" the question now becomes whether or not the economy can grow faster than 2 percent.