Yes, the connection between late talking and engineering is an intriguing one.
My DP (physicist/engineer) was a late talker too and two colleagues he talked to about the link also turned out to have been late talkers.
And, as it happens, my late talking DS, whose first sentence at 3.5 years old was ‘Look, a plane!’, is now hoping to study aeronautical engineering at university!
There’s even a book by Thomas Sowell on the topic called the Einstein Syndrome: bright children who talk late.
The term Einstein Syndrome is used because of some peculiarities of Einstein’s brain architecture, which might, it is posited, be present in the brains of children in this group. (The brain of Einstein, who was a late talker, was preserved after his death and there have been studies done on it trying to ascertain the origin of his genius.)
Steven Pinker, who researches into language acquisition in children, has written about the studies, saying:
The neuroscientists speculated that Einstein's parietal lobes expanded early in prenatal development, giving him larger, undivided lobules that accommodated richer and more tightly integrated circuits for mathematical and spatial reasoning. This may help explain Einstein's other famous cognitive trait: he did not speak until he was 3 years old. Many late-talking children grow up to be engineers, mathematicians and scientists, including the physicists Richard Feynman and Edward Teller. Perhaps this is because different mental functions compete for real estate as they develop in the cerebral cortex.
So the suggestion is that a part of the brain associated with linguistic processing can be ‘crowded out’ by a burgeoning neighbouring region associated with visuo-spatial processing.
I’m not suggesting that any one of us has a mini-Einstein on our hands but there does seem to be a distinct class of children – mainly boys – who are late to talk and who demonstrate this pattern of visuo-spatial strength/linguistic weakness.