Will Thorne Staff Writer“America’s Got Talent” dipped to its lowest rating and total viewership to date, but still led NBC to a comfortable win on Tuesday night.The talent show’s latest episode came in at a 1.1 rating (down 11% on last week) among adults 18-49, and drew 8.3 million total viewers (down 4% on last week). Those represent its lowest scores in both metrics for this season to date.