You bet your pants it does!
When I first started this blog, it took an entire thirty minutes to write one blog post. And I type a whopping 80 words per minute! That is some pathetically slow writing.
Now, that same half hour produces at least three posts. As soon as my fingertips touch the keys, words flow onto the screen. On top of an increased rate of production, there have been improvements in other areas as well:
In conclusion, writing is powerful and beneficial. Keep a diary. Conjure up some short stories. Detail plans to accomplish goals. Just do something to keep you writing!