This is wonderful news.
As far as how much time all thirteen numbers will take up, why not try a very rough estimate:
13 numbers * about 5 minutes for each = 65 minutes (1 hour 5 minutes)
17 categories * about 5 minutes for each = 85 minutes (1 hour 25 minutes)
2 three-minute commercial breaks each half-hour * 6 half-hours = 36 minutes
Round up and all those extra numbers will probably add about a half-hour to forty-five minutes to the telecast. And really, if it's just a big advertisement for Broadway, isn't that a good thing?
Of course, this is the best of all possible cases-scenario.
"Y'know, I think Bertolt Brecht was rolling in his grave."
-Nellie McKay on the 2006 Broadway production of The Threepenny Opera, in which she played Polly Peachum