The fact that most people say they read at least one book tells us pretty much nothing about the state of deep reading, and therefore is not very relevant to the linked article. Granted, the linked article doesn't cite sources for its conclusions either, but based on the books I see read in public...I believe them.
A YEAR.
In a virtue-signalling survey that will illicit higher responses than we might otherwise expect (self reported rates of untested things seen as "good" tend to be over-report on such surveys, while rates of things seen as "bad" then to be under-reported), i think that actually supports the authors point.
Especially when he/she mentions people with a stack of books on their bedstand or whom pack their kindles with multiple books at a time for holidaying.
Oh, well in that case... I probably read an average of 4 to 5 books a day (to my young children) while drinking fair-trade coffee, on my American-made couch with vegan-friendly upholstery, lit by energy-efficient LED lighting that changes color temperature with my circadian rhythm.
https://www.smithsonianmag.com/smart-news/27-percent-america...