An 800 single score is supposed to be 3 sigma above average, about 1 person out of every 740. There are just about a thousand people with 1600 scores every year

An 800 single score is supposed to be 3 sigma above average, about 1 person out of every 740. There are just about a thousand people with 1600 scores every year, out of 2 million test takers. This is the way it's supposed to work.