"Clever" in the article means "high IQ". Some interesting nuggets. E.g.:

   maths prodigy Sufiah Yusof. Enrolled at Oxford
   University aged 12, she dropped out of her
   course before taking her finals and started
   waitressing. She later worked as a call girl

and

   fair, unbiased decision-making is largely
   independent of IQ

and

   someone with an IQ of 140 is about twice
   as likely to max out their credit card.

etc.

I was initially going to skim the article, but I went back and read the whole thing.