Is he just genius or does he have negative sides too that will prevent him from leading normal life?
I think all geniuses are alienated from their own age group. This allows for social adjustmental problems and maybe permanent social awkwardness. Spending all ones' time with older, mature people when one is pre-pubescent can't be too good either. If one is smart, like an adult, folks can confuse you with one. Mental maturity doesn't leap to much forward with smarts.
I think he was referring to an "idiot savant" type of person, missing intellegence yet able to do amazing feats of math or science or pattern recognition like codes while being completely unable to take care of oneself. This dude has genius intellegence and is 9. If he was like the before mentioned he wouldn't be going to college.