National Public Radio’s midday show Day to Day is growing its audience must faster than its producers expected. “The hourlong program airs midday Monday through Friday on 103 stations, as of last week. NPR had been shooting for 75 stations by Sept. 30. Between its launch July 28 and the fall ratings period, Day to Day built a weekly audience of 1,148,200. That’s the biggest audience ever for an NPR show in its first book, says Jay Kernis, NPR’s senior v.p. of programming.”