Larry Summers caught a lot of grief for a statement that has been oft-misreported:
"It does appear that on many, many different human attributes- height, weight, propensity for criminality, overall IQ, mathematical ability, scientific ability - there is relatively clear evidence that whatever the difference in means - which can be debated - there is a difference in the standard deviation, and variability of a male and a female population."
Personally, I don't have a lot of problems with the gender hypothesis, but I am skeptical of our ability to test intelligence. I think most of us in the real world have enough experience to understand that the people we meet have a range of cognitive abilities, but I am not sure it is even possible to put a number on this, particularly since my experience is that there are many categories of intelligence and intelligence in one area is not intelligence in another. Besides, I think most IQ tests are dominated by logic problems where one's ability to solve them improves with practice and training -- but this is counter to the idea we are somehow testing some property separate from education or training.
Update: As to the idea of different intelligences, I will offer myself as an example. In my prime, I was pretty freaking good at advanced math, and later in life I got pretty good at deconstructing business problems that were pretty complex. But I can't spell my way out of a paper bag, and I have a horrendous proof-reading ability (as all my readers will know by now). I can stare at text over and over and still miss obvious errors. I have a fabulous memory for concepts and problem-solving approaches, and I can recite the entirety of Monty Python and the Holy Grail from memory, but have almost no ability to retain a name, date, or phone number.