Mr. Bush’s score on the Air Force Officer Qualifying Test at age 22 again suggests that his I.Q was the mid-120’s, putting Mr. Bush in about the 95th percentile of the population, according to Mr. Sailer. Mr. Kerry’s I.Q. was about 120, in the 91st percentile, according to Mr. Sailer’s extrapolation of his score at age 22 on the Navy Officer Qualification Test.
Linda Gottfredson, an I.Q. expert at the University of Delaware, called it a creditable analysis said she was not surprised at the results or that so many people had assumed that Mr. Kerry was smarter. “People will often be misled into thinking someone is brighter if he says something complicated they can’t understand,” Professor Gottfredson said.
The study they reference is here. It gets pretty dense and has to make some assumptions about average officer candidates, which drains it of some persuasiveness.