I am not shooting the Main (there are near 600 doing it) but some of my friends are in it. Based on their scores, it is likely a test.
The FITASC was a test. There were birds hunting dirt after being edgy to start and some incomers that waffled up and down in the wind, or transitioned in and out of the sunlight on edge before turning with a drop. Targets were sliding toward or away, but not obvious on one part of the Parcour, but readily evident from another.
Interestingly, the 12ga sub was some of the most technical targets with only a couple longer targets. Lots of edge or crossing early true pairs. Had to make choices and be cognizant of the wind pushing some of the second birds.
I had a great, but humbling time. On some stands, I couldn't hit my backside with both hands if I had a map.