I guess the more intelligent types tend to be more introverted as you say and thus generally have less opportunities to show any innate funniness they have. I think personality type comes into play too, a serious introvert focused on his grades is going to be less open to social interaction than an easy going extroverted type. Confidence too would probably make it easier to be funnier as you would be less prone to embarrassment.(Original post by 13 1 20 8 42)
I guess. It is arguable that many of the guys with As are not that intelligent, I suppose. I'd say that on the whole the relative introversion of many intelligent people can often hide their wit. But I suppose a good sense of humour is nothing if unused, and, indeed, it is confidence that allows you to tap into it more readily. Those who are intelligent and gregarious are most certainly the funniest, in my experience. About half of the guys in the "gifted and talented" group, based on some weird IQ-esque tests, in my school were like this. Some of these under performed at GCSE. I don't think GCSEs are a good indicator for intelligence, especially for guys (well, it depends on the individual, but I mean on average I think guys are less likely to care and more likely to mature later).
I'm not saying it's a hard and fast rule, I'm just saying in my experience, the funnier guys tend to be less academic and less serious about life in general.
100s of personal statements examples here