Ethan
Money List Winner
The WHS index is the average of your best 8 or 20 scores, so likely to be between the 4th or 5th best, therefore around the 78th percentile. So you would expect around 3 or 4 times as many scores to be worse as better, and the number that are spot on is probably higher for lower handicap players who are likely to have a more consistent score range.
The main reason it is 8/20 is because winning scores are strongly influenced by variability. A 30 handicapper will occasionally shoot 10 below their handicap, whereas a 2 handicap will never do that so the pivot point for the system is set closer to the better end of the score range to reduce the impact of variability on winning scores. The old 3/4 or 7/8 of handicap had the same intent.
As to the number you expect, that depends on your optimism. I wouldn't go out if I didn't expect to play a decent round. That doesn't mean I usually actually do, though.
The main reason it is 8/20 is because winning scores are strongly influenced by variability. A 30 handicapper will occasionally shoot 10 below their handicap, whereas a 2 handicap will never do that so the pivot point for the system is set closer to the better end of the score range to reduce the impact of variability on winning scores. The old 3/4 or 7/8 of handicap had the same intent.
As to the number you expect, that depends on your optimism. I wouldn't go out if I didn't expect to play a decent round. That doesn't mean I usually actually do, though.