Ballmer had a perfect 800 score on his SAT math section. He kept the company expanding revenue and profits for a decade and a half, which is an eternity in Internet time. His Windows on mobile strategy was a few years late from being a huge success (agreed, that is also an eternity).
Intelligence is not just your SAT math score (and for the record, I had a 770). His business/tactical decisions were obvious ones once Windows achieved hegemony.
