The ratings are in from TVBytheNumbers:
NBC easily won the night with adults 18-49 and total viewers as America’s Got Talent averaged a 4.5 adults 18-49 rating between 9-11p, its second highest rating ever trailing only the series debut (4.6) on June 21, 2006.
The America’s Got Talent 3 hour block on NBC last night was split between the last hour of auditions at 8 pm, and Las Vegas rounds Part 1 from 9-11:
8:00 NBC America’s Got Talent 3.4/11 12.21
9:00 NBC America’s Got Talent 4.5/13 15.65
10:00 NBC America’s Got Talent 4.5/12 15.37