This implies that the period with massively more centralized control of information had a truer consensus reality.
That seems… unlikely?
At least they mostly felt the need to pick a single consensus reality to approximate. How well it represented common experience, well...
It wasn't that centralized (many many independent newspapers and such).
And then "information" is doing a lot of work when you start talking about social media.
It was better than the illusion of freedom of information a lot of people have now. In reality mass manipulation is happening on a global scale at unprecedented levels.