I remember hearing that as well. Unfortunately, I didn't pay much attention as it would require us doing two things we don't do - stay in AK past 3 PM and go and see the Nemo musical again.
Guests who have an Advanced Dining Reservation at Animal Kingdom's Tusker House restaurant for dining between 1:00 and 1:40pm will receive a ticket for reserved seating at the 3:15 performance of "Finding Nemo the Musical." It is asked that you arrive 30 minutes prior to the performance. This policy is ONLY available for ADR's from 1:00 - 1:40pm.