I just found out about a condition called "Sluggish Cognitive Tempo" which is similar but distinct to ADHD https://en.wikipedia.org/wiki/Sluggish_cognitive_tempo. Instead of being an attention problem as it is with ADD, people with this condition are simply "slow". The only IQ difference between SCT'ers and control groups seems to be in processing speed, while all other values (verbal, spatial) are the same. This is in comparison to ADHD which generally takes off 5-7 IQ points compared to control groups.
This puzzles me because I associate intelligence with fast wit mostly. Does this mean that things like verbal or spatial IQ have upper genetic bounds regardless of how fast you reach them? Say you have 130 spatial IQ but much lower processing IQ: would a person just take longer to reach the 130 IQ potential than a person with say, a lower bound of 110 Sp. IQ, but higher processing speed making them "reach it" faster?
Can one be both smart and "slow"?