It depends what is meant by computer. Certainly they don't have anything analogous to source code, registers and the operations that CPUs carry out on them, addressable memory, etc. Nurons are also different in many significant respects from the analogous elements in computational neural nets.
However there are a lot of flat statements like this made in the article where I’m not entirely sure what the author meant or what grounds he had for saying it and this is one of them. Another is:
"The invention of language was understood at once to be incredibly useful. Again, it seems to have spread through the species almost instantaneously."
How can anyone possibly know that, especially if we have no real idea when it happened?
Edit:
Another thing that got my back up a bit were the disdainful references to 'influential persons', as though David Krakauer and Cormac McCarthy are renegade outsiders.
There are some really good points here that I largely agree with. Most of what we do or know or think or even say is processed or generated by the unconcious mind. I know what I am going to write here and now, but I don't know it in linguistic form until I actually write it. I'm generating it in a non-English language representation in my brain and converting that written into English and only part of that pipeline is really conscious.