I would say it depends alot on the person. I have always felt that writing came easier than expressing myself verbally. I enjoy technical writing and have been told that I am good at it. But I have difficult interacting socially with people.

My son though is quite different from me despite both of us having ADHD and bipolar. He has a written language disability that I do not have and he finds writing difficult. But he interacts with people better than I did when I was his age.

So many variables it is difficult to say. I did notice recently that when the winter weather was bad and I was unable to refill my meds I posted longer posts than I do normally. I think I was probably manic then. It was kind of hard to find the point of my posts at that time because they were buried in so much extraneous information.