Sure the wall-to-wall Winter Olympics left a lot of people wondering why they should give half-a-crap about ice dancing, but NBC has bounced back with its post-Olympic lineup . NBC’s two new prime time series, ‘Parenthood’ and ‘The Marriage Ref,’ won the ratings game against their competitors, and even Jay Leno’s triumphant return to ‘The Tonight Show’ beat David Letterman’s ‘Late Show.’...