Last week in MediaDailyNews, these results were trumpeted: Comparing listening patterns from spring 2009 to spring 2010, [Researcher Richard] Harker found that the proportion of the U.S. population that is listening to broadcast radio actually grew from 91.4% to 93% over that period. Average weekly listening dipped about 1%, or 11 minutes, to 17.4 hours per week. The conclusion?  That “digital alternatives have failed to make a big dent in local broadcast radio listening.” Th