Why do you say that? As a stenographer, it absolutely happens: I know because when I try to write along to some people, my words per minute meter goes above 230 occasionally. (It would go above 230 wpm more than "occasionally" except that I'm not that fast yet.)

Here's an example of a professional stenographer dealing with 300+ wpm days (search "300wpm" in this page): https://jadeluxe.wordpress.com/2014/12/30/year-in-career-201...