From The Hollywood Reporter:
Fast National returns give the series premiere a 3.2 rating with adults 18-49 -- 13.1 million viewers. That ties it with The Following for second-highest-rated drama premiere of the 2012-13 season (both falling shy of Revolution) and gives it the biggest audience of a drama launch in the last year. It also marks CBS most-watched summer debut since 2000 (Big Brother) and its highest rated since 2005 (Fire Me Please).
Good news. I liked it too.