Once delivered 12.8 million viewers and a 3.9 adults 18-49 rating, improving a whopping 86 percent on the usual time period average of Extreme Makeover in the slot. That makes Once Upon a Time the highest-rated new drama series premiere of the season — bigger than ABC’s Revenge, CBS’ Person of Interest or Fox’s Terra Nova.
Be interesting to see if the second episode is as strong. If so, then I'd say there's a good chance at a second season.