Sathington, you're probably right about I.Q. I'm no expert on the subject, and neither am I up to date on current research. I'm also aware that there have been many different I.Q. indexes used in the past. (Cattel, Terman, etc, etc.) Also, I generally place very little credence in I.Q. scores -- I don't think they matter much.
With that said, my understanding of I.Q. is/was as follows: An I.Q. score below 75 signifies mental retardation. The average white American's I.Q. is about 100. An I.Q. in the 140-160 range is superior/gifted. A genius level I. Q. Is above 160. And numerous geniuses in the past (Goethe, Kant, Newton, etc) have had I.Q.'s measuring up around 200. Again, I don't think any of this even matters -- the whole subject is stupid. Lol.