I find it interesting that with ASD, there is (apparently, from this discussion), a tendency to be concise to the point of meaning being potentially lost but explains as quickly as possible, while with ADHD (which I have), there is a tendency to over-explain and be too verbose. With ADHD, we tend to worry that our thoughts aren't clear enough for others and go to great lengths to make sure our meaning is understood, which has its own problems (like people getting exhausted with us for our long windedness).
I have diagnosed ADHD and maybe a little spicy hint of ASD but who knows. I end up somewhere in the middle, I explain things very quickly in lots of words and communicate almost nothing.
I get exhausted with my long-windedness while I am still talking. Still, a lot of my friends either don't mind it, or use my explicitly given permission to just interrupt me if it's an issue.