At this point, no one knows whether this is the reason why Einstein took so long to develop the ability to speak, much less whether this is true of the other people of outstanding intellect who were also late in beginning to speak. What is known, however, is that there are a number of disabilities that are more common among people of high intellect than in the general population.
Members of the high-IQ Mensa society, for example, have a far higher than normal incidence of allergies. A sample of youngsters enrolled in the Johns Hopkins program for mathematically precocious youths -- kids who can score 700 on the math SAT when they are just 12 years old -- showed that more than four-fifths of them were allergic and/or myopic and/or left-handed.
This is all consistent with one region of the brain having above normal development and taking resources that leave some other region or regions with less than the usual resources for performing other functions. It is also consistent with the fact that some bright children who talk late remain impervious to all attempts of parents or professionals to get them to talk at the normal time. Yet these same kids later begin to speak on their own, sometimes after parents have finally just given up hope and stopped trying.
Noted language authority and neuroscientist Steven Pinker of M.I.T. says, "language seems to develop about as quickly as the growing brain can handle it." While this was a statement about the general development of language, it may be especially relevant to bright children who talk late. As the whole brain grows in early childhood, increasing the total resources available, the regions whose resources have been pre-empted elsewhere can now catch up and develop normally.
My research and that of Professor Camarata have turned up a number of patterns in children with the Einstein Syndrome that were similar to what biographies of Einstein himself reveal. Most children who talk late are not like those in our studies. But a remarkable number are.
Unfortunately, many of these children get misdiagnosed as retarded, autistic or as having an attention deficit