I think it depends on what branch you applied for as well. For instance, the pass for SNCO ATC was 80 yet the pass for WSOP is 100. Not every section of the test you do counts towards each branch (I"m presuming this looking at the feedback sheet), only the ones that are relevant so you could probably only compare scores against your particular branch.
I'm like you though, I have so much interest in how they calculate the scores. I was convinced that I had failed my aptitude (literally, I would have put my house on it), so was unbelievably surprised to see that I'd passed with a good score.
Anderson134353, when did you attend C-BAT Assessment? Well done on the pass.