The lines at Busch Gardens are never necessarily long, compared to queuing times at places like Universal Studios or Walt Disney World in Orlando.
The average wait times on Busch Gardens Popular Attractions(For Me):
Montu: Walk-On - 5 Minutes
Cheetah Hunt - 10 Minutes - 35 Minutes
SheiKra - Walk-On - 15 Minutes
Kumba - Walk-On almost always
Scorpion - 5 Minutes - 20 Minutes
Gwazi - You might be waiting at the entrance of this one for a while, but don't worry! The ride is definitely not closed for good!
Falcon's Fury - 15 Minutes - 45 Minutes
In all of my visits to this park, I have never purchased a Quick Queue, because I don't need it. Hope this helped!