Here's the Google Maps article: https://laurenleek.substack.com/p/how-google-maps-quietly-al... - note that the Hacker News title left that word out: https://news.ycombinator.com/item?id=46203343
It's possible I was subconsciously influenced by that article (I saw it linked from a few places yesterday I think), but in this case I really did want to emphasize that OpenAI have started doing this without making any announcements about it at all, which I think is noteworthy in its own right.
(I'm also quite enjoying that this may be the second time I've leaked the existence of skills from a major provider - I wrote about Anthropic's skills implementation a week before they formally announced it: https://simonwillison.net/2025/Oct/10/claude-skills/)
That being said I’m quite sure that it’s being used more frequently recently. For example, I read a shortish 2000-word article yesterday that uses the word “quietly” four times. And ChatGPT 5.1 used it in most of its responses. Also I’d expect that the frequency illusion wears off quite quickly, whereas I’ve noticed “quietly” for some time and the feeling doesn’t seem to be wearing off. Maybe you’ll start to notice it now too!