I don't believe so, since there are Extroverts who are intelligent. Though the most intelligent types (on average) are Introverts, by that point, it starts manifesting in ways that are probably, and for most of the time, somewhat counter-intuitive, in that they will avoid the practical and immerse themselves with the non-practical and/or philosophical, tend to explain others' not understanding their views by the other's lack of intelligence (thus increasing the gap between the Introvert and the others (It should be noted that this usually causes the others to overstate the Introvert's intelligence and abilities, often to the point of believing the Introvert's intellectual or academic success is due to "him being him.")), and tend to have a bit (or more) of antisocial tendencies. These intelligent Introverts (most people who are, but not limited to, INTJ, INTP, INFJ, INFP) tend to mask their emotions and feelings and generally don't like speaking of their feelings, especially negative ones. The intelligent Extroverts (most people who are, but not limited to, ENTJ, ENTP) tend to be more free-speaking with their emotions. It should be noted that the INTJ, INTP, INFJ, and INFP types are some of the rarest personality types, so in fact, one would see somewhat of a balance between intelligent Introverts and intelligent Extroverts. For those who believe I'm placing a stereotype or a bias upon these types, I am not. These are observances of tendencies that I have noted among people I know and tendencies that are seen among these types. And for those who believe that I'm assuming too much about the state of intelligent Introverts, I can only respond that I AM one. I also have friends who are. All of us exert these tendencies and characteristics.
I don't think intelligence has anything to do with being able to hide emotions. You can know ways to hide it but that doesn't correlate with intelligence at all. While being a really intelligent person, I myself don't even really care about hiding my feelings and I think people are sometimes able to read through me (aside from people who can read through me almost anytime).