It gets rather more complex, since McLuhun points out that writing allows you to do a lot of very different things that yoi can't do with auditory information. You can lay informaton out in tables, you can see how long the paragraph you're reading is. And I'm quite sure that a medieval serf would see the world in a completely different way to a 19th century writer. But that same serf, who's now living in a world with literacy, would see things completely different to how a pre-literate society.
He also points out how reading influences thoughts of individuality vs togetherness. Reading a story makes you a private person. Listening to/telling a story out loud means you're sharing it with everyone else. It's the same information, but the way that its transmitted changes how it's interpreted.
In a modern context earphones and headphones complicates this last point, but the idea that the medium has absolutely no serious impact on thoughts seems more improbable the more I think about it.
In thinking about this and looking it up, I got interested in whether this had any relation to Euclidian geometry, considering that seems to be an ordered concept, and he has this to say about it "Euclid was one of the first defects of the alphabet. That is, when you pull ouy everything except the figure, all the attributes of space and time are pulled out except certain abstract features. Euclid could not have happened without the alphabet."
So it seems both of us are thinking along the same lines here. Which, incidentally, you can't do with acoustic media. Becasue there are no lines with which to think across.
It's casual expressions and phrases like that which I've suddenly become very conscious of all of a sudden.