I've checked out that explanation and even took statistics in college and still have no idea what a t-score is. I took the CA dispatch test a couple years ago and received a score of something like 65.7 or 67.5, the letter also included a percentage score and said I received a 97%, so you are likely in the high 90's.
I guess the t-score is also a comparison of all the people who took the test that day. There were about 300 people taking the test, most of them couldn't figure out where to sign in (it was arranged in alphabetical order), so the competition wasn't too tough
There are always going to be staggeringly stupid people in the world. What separates you from them is your reactions when you encounter them.
mobrien316