I guess your point is: Target Drill performance is a predictor of total BU Exam score.
how often do you score 19 or 20 out of 20?Even the Target Pool drill can become a pure test of execution ability. For example, I have figured out my optimal stroke length and tip position to use for every target. So for me, the drill is more a measure of stroke consistency than CB control knowledge and ability. But I still enjoy the challenge and the practice it gives me.
Yes, my theory is it correlates best with total BU Exam score. Like there are people who constantly perform horribly at balls 6-9 in wheel drill or banks or shooting elevated. And some drills are easier to get perfect score every time. But this one seem to correlate so good, if you need a good estimation of Player Ability in less time (15 min instead of 2 hours) you get almost exactly as close in 15 min.