After several hours of delay from Nielsen, we finally have last night's Big 4 primetime ratings, which showed another easy Tuesday win for NBC. Sure, America's Got Talent (2.4/10) dipped 8% among adults 18-49 from its June 20 show to a season low, but the Comcast-owned net ultimately snared a 2.3/9 rating overall and 10.65 million viewers.