"They are usually poor to about average in linguistic abilities and are sometimes handicapped in the writing and reading comprehension departments compared to the average person. " You must still be in high school (or younger) if you really believe this (given your use of token words like "dichotomy," maybe you are in debate/forensics). Talk to anyone in college that studies a technical field, i doubt you can find anyone who fits your description. *Especially* in technical fields, significant education and emphasis is on technical communication. Have you ever heard a scientist/engineer/mathematician speak? Even the stereotype is that they are well-spoken, more eloquent than I find liberal arts degree holders to be. Read any article, and you will find it written decently at least.
Being "gifted" is not something that I really believe in. Some people may have a stronger proclivity towards one side or the other, and may even be slightly better at say, math, in the beginning. But, being gifted only goes so far (the end of high school is the end of it). After high school, there is no such thing as being gifted, the material is too advanced (and, to be honest, everyone sucks at it at first. Even those who were "good" at it in high school). I think one problem with your statements is that it is based on a transient platitude, which loses meaning when education starts to become more substantial. In rare cases for anomalously talented individuals (e.g. Feynmann), your case might have more standing. But, even though Feynmann was fantastically adept at physics, he was not in any way suffering in communication or reading. I have never met someone as capable as people have described someone as he to be, so the case is really not something to be considered in too much detail.
My take on this is not that they are necessarily divergent, but that there is a directionality to all of this. Go into math/science/engineering, and you can do your own field and usually will be just fine, if not great, at language. If we traverse the opposite direction where we pursue a humanities field, you will be fine at your liberal arts field, but science/math/engineering is not just something most anyone can do without an education. In fact, it takes a few years for even those who are majoring in these fields to get good at it. Rather, as a professor of mine likes to phrase things, it would take a few years for students who study science/math/engineering to "show signs of being capable." lol.