Ken Doctor: “By the end of this year, figure that about 20 percent of the U.S.’s 1,400-plus dailies will be charging for digital access. Gannett’s February announcement that it’s going paywall at all its 80 newspapers [except USA Today] galvanized attention; when the third largest U.S. newspaper site, the Los Angeles Times, went paid this week, more nodding was seen in publishers’ suites.”