Tour Pro my was 67.68 today ,played four 9 holes. Posted good scores even -5 under, But only dropped down to 67.04 Hum...
You have to double the numbers of nine-holers for average calculation. With that, we get (sorted)
62 - 68 - 72 - 78.
Only one score is below your average, two are reasonably above. This does not point to extreme average amelioration...
Ahh, the Tour Pro days. I remember them well... :/