> That’s it. “Read 3 files.” Which files? Doesn’t matter.

It doesn't say "Read 3 files." though - it says "Read 3 files (ctrl+o to expand)" and you press ctrl+o and it expands the output to give you the detail.

It's a really useful feature to increase the signal to noise ratio where it's usually safe to do so.

I suspect the author simply needs to enable verbose mode output.

This is directly addressed in the article.