I think the statement "as a rule people planning to go into teaching rank academically near the bottom of the college population" should really have a source to back it up.
teachers seem solidly in the middle for the three groups.
This brings up something interesting, as a group, we like to think of ourselves as above average when compared to other disciplines, but Computer & Info. Sciences was comparable to Education. Consider that in many states, ALL teachers must go to graduate school, so many more of them are taking the GRE than Computer & Info. Sciences.
I suppose most schools with Computer Science grad programs probably also have a lite Information Science/Business program that would drag our scores down significantly. I know mine did.
'Education - something' seems to fill a lot of lower rungs.
I know that these scores were a semi-common meme around grad school when I was there. People wondered why philosophers/physicists/mathematicians gravitated towards each other, but it was silently suspected among a few of us that it was due to similar analytical ability. The results were even more pronounced when the logic test still existed.
I think that one shouldn't overemphasize the mean though. There's a lot to be said for the distribution -- in physics, the entire lower part of the curve gets weeded out. That doesn't seem to happen in CS. And philosophers learn to write arguments and navigate arcane vocabularies as a matter of course. Perhaps the math result is indicative of general ability, but they have to do logic, too.
