So many links to interesting articles and studies. I haven't looked at them all yet, but there's the slower but shrewder aging brain, the "eye of the cycle" effect for disaster survivors, the pleasure of pain and are you smart or just pretending to be (oh dear, think I'll have to read that one and 'fess up).
Edited to add. Just read "smart seeming" article. Clearly I (being female) am one of those less likely to be perceived as smart. Interesting thoughts on prejudice, our self-image and educational/employment outcomes.