Beverly Hills, CA -- It’s always interesting when executives from Nielsen come to TCA to make presentations and take questions from reporters and critics who spend most of their time focusing on programming and performers. Few TCA members devote very much time to reporting on research and data, but dozens of them turn out seeking to understand why the networks cancel certain shows while renewing others. There are still terrible shows that arrive D.O.A. and are mercifully cancelled before they do any lasting damage, but they are now the exception rather than the rule. Today, with Live+3, Live+7, Live+35 and even longer periods of audience measurement even mediocre series have the luxury of time on their hands as viewers discover them at various times during their first season or two and across a multitude of platforms.