thanks for the ensuing discussion to my post, even though it deviates from my question by some slight measure. ;-)
IMHO, a being with an overall better-developed faculties is more intelligent than a being with less developed faculties. So, intelligence is a measure of how well our senses work, and how well the brain comprehend, process, retain and apply the information acquired through the senses. Modern research is slowly revealing how the brain works as an organ, and how its functions are as tangible as we understand how our eyes see and how our ears hear.
As for EQ and SQ, I think it is a psychological play of our brain, and reflect to an extend how we relate ourselves to the world, the universe, and the "unknown". These are just my thoughts.