As someone that is "on the spectrum," I can report that focus can be pretty awesome. I generate vast amounts of code, in relatively short time, and am an insanely obsessive debugger. However, it don't come for free. If I get "roused" from my "fugue" (what I call "the zone"), I can be cranky. This has not always been helpful in my marriage. Also, I find that I can be "vocabularily challenged" for a few minutes after I…
I find my lingual knots tend to get worked out after a short while, but if I have been exceptionally deep focused I can get almost a focus hangover where the lingual hangups last a very long time.
I know most theories about tasks using only one hemisphere of the brain have been debunked but it does seem like language and some logic tasks can be at odds. I wonder if it extends into other things than language.