In Probst's blog he states the Marcus has the highest IQ of all the contestants. He goes on to say that you'd be surprised at who is second. Who do you think that is?
Link to blog: http://popwatch.ew.com/popwatch/2008/12/jeff-probst-b-1.html
Corinne, Randy, Charlie, Bob, Ken: Obviously above average intelligence, so no surprise factor.
Crystal: Probably above average intelligence. Not enough surprise factor.
Sugar: Definitely could be her. She could have intelligence, but ultimately emotions dictate her actions which would explain the illogical decisions.
Dan: Possible. A bumbling idiot on the show, but a lawyer in real life. Self-esteem issues prevented real intelligence from showing?
Paloma, Jackie, Kelly: Don't know enough about them, not sure how this would be a surprise either way about their intelligence.
Gillian: Is an RN, so likely has above average intelligence. No surprise factor.
Michele: Seemed clueless about the game, but didn't see enough of her to really know. A distant possibility.
Susie: Doubt it. I think she's average intelligence at best.
GC: Maybe? Came across as immature rather than stupid.
Matty: Comes from rich family, could be. Hasn't shown much intelligence, so there is surprise factor.
Ace: One of those guys that isn't as smart as he thinks he is, so I doubt it.