Check out A Testimonial for Good English by rogersgeorge. Here is an excerpt:
Look what Dilbert said to derogate this document: Full of typos!
The rule: typographical errors matter. I wrote about this in the past more than once.
Sigh. A couple days later Scott repeated the joke:
And a subtle dig—the gal is their tech writer. She could see what the developer…
The full article is available here.