In June, our ADR was for 7:30 pm. We arrived at 7:15 and were told to have a drink by the bar. We sat down, ordered drinks and our buzzer went off! I went to the podium while DH paid for the drinks. We had appetizers, entrees and dessert and were out of there by 8:45 pm. We were not rushed, it was a nice meal.
I would also guess it depends how crowded the restaurant is and how quickly you're seated.
Are you staying at the GF? You can have dinner from Narcoossee's via private dining. DH can't wait to do this on another trip! He wants to eat surf and turf on his balcony!!