I remember reading an article[0] about how more than half of all "news" is spin.

It was done by an Australian newspaper, called Crikey.

[0] https://www.crikey.com.au/2010/03/15/over-half-your-news-is-...

Here's the continuing series. They milked it for a while: https://www.crikey.com.au/topic/spinning-the-media/