My reading was just that the parent commenter was telling a story by relating an interesting anecdote. That's exactly what I come here for. People won't do that as much if the common response is weird aggression like your comments in this thread. That would be a shame.
You could have just written a little comment saying, "in my experience, you're incorrect about the speed of reading from /dev/zero". The difference in your remembered experiences and your conversation about it would have been interesting to me. Instead you picked a fight, which is not interesting.