Just did the Uffizi Gallery with a time slot for the Visari Corridor.
If you are doing the same they recommend two hours in the Uffizi before the meet up at the Corridor. You need to make it three hours.
The Tiburona Room had a wait of 45 minutes.
I missed the sign past the cafeteria that indicated that that was the only way down to the first floor.
Crowds were enormous so to get through the rooms is a very lengthy process.