Once a child hits a particular school's cutoff for GT, the numbers themselves are pretty meaningless to most people, I would guess.
That's pretty much what we've found as well. School personnel (even some school counselors with Masters degrees in counseling or psychology) often don't have enough experience with levels of giftedness to understand the differences between kids who are in the 95th percentile in one area and kids who are in the 99th and above composite. 99.9th, like st pauli girl noted, doesn't seem to mean any more than 99th either to many educators. The tests they are familiar with don't give that degree of specificity.
