Ah, good. So the extended norm thing happens between testing and scaling the score? That makes me feel better.
wrt to everyone you know being bright, it's the same for us. All of my friends (and their kids) would probably test at least 120 or 130 IQ. Which isn't surprising because 130 is 1 in 44 people. But, you do self-select for people who are like you, have similar interests, professions, etc. My best girl friends are all really interested in stuff and having deep discussions, and their kids are all ahead of their classes at school.
But, if you look at that IQ frequency chart
http://www.iqcomparisonsite.com/IQtable.aspx 150 is 1 in 741 but 150 is 1 in 2331. And going from 154 to 156 takes you from roughly 1 in 6,000 to 1 in 10,000. That's certainly rare enough to be a problem finding peers at school. For my child, I don't give a toss about the world in total, I want children who live near us and are a similar age and aren't homeschooled. And by that chart there would be 28 people in our county with a score from 150 to the top end of the range. Luckily it's a college town, so there's not a random distribution and those frequencies don't hold true. But this is why they have magnet schools.
