In fast national ratings, the number for last night’s preview of GO ON was updated (and downgraded) from 6.4 to 5.6. This wasn’t unexpected, since NBC had played a little game by starting Go On at 11:06 PM, guaranteeing that the first figures released would include 6 minutes of Olympics in its half-hour, and thus giving a little steroid boost to the rating. Make no mistake, 5.6 is a fantastic number for a sitcom, and if Go On can score anywhere in that vicinity when it actually premieres, Comcast and the NBC brass will start a parade. But the 5.6 also means that probably 45% of Olympics viewers changed the channel or turned the TV off when Go On started. In any case, last night the show had, by a large margin, the biggest lead-in it will ever see, and September 11, when the show actually begins in its regular timeslot, is still far away. We’ll find out then whether Go On really has a place on the medals podium.