Definitely depends on the person. I'm the same way as the top commenter, I will process next to nothing of the context of the sentence when typing for speed/technique. Then again I also have the problem of reading sentences and just generally not processing any of the meaning (especially when I have other thoughts in my head), leading to me having to reread stuff.

Same goes for reading, trying to intentionally read fast for practice/competition, none of the meaning makes it to my brain. Usually when I read a book I read it at somewhat of a narrating-out-loud pace, makes it feel more comfortable and like I'm watching a movie in my head.