"Next up was The CW (2.85 million viewers, #5; adults 18-49: 1.3, #3) with the season premieres of "Smallville" (2.90 million viewers, #12; adults 18-49: 1.3, #6) and "Supernatural" (2.79 million viewers, #13; adults 18-49: 1.2, #T7)."
Supernatural beat last year's America's Next Top Model that aired in the same timeslot by 140%.
SUPERNATURAL premiere draws 2.79 million viewers/1.2 rating (beating a new Good Guys and a Whole Truth repeat)
Sources: Futon Critc and SpoilerTV