Must be a regional thing. What part of the country are you from?
The standard BCA scoring as Gideon was talking about gives the winner 10 points and the loser the score of their balls pocketed. We have five person teams and play a round robin for a total of 25 games a night. And use two tables so there are only 12.5 games played per table per night. The highest score you can get is a 50 which would make you a 10.0 average. In our small league the top players are usually clustered right around 9.0 to maybe 8.7. The funny thing is that the 9.0 seems to be considerably better than the 8.5 playing head to head. The 8.5 might only win a game or two out of ten.
Sometimes with this scoring system you can end up with a zero when you might easily have had a 5 by picking off the ducks instead of playing for the eventual win. Nothing is perfect but the cream does eventually rise to the top as it probably does in your league too with the scoring system you use.
JC
