I will concur with that.

When I first started encoding MP3s I used a 128kbps rate which is noticeably inferior to the original CD. I noticed this in the early 2000s when I would up listening to a CD of some music I usually listened to as a 128kbps MP3 and was blown away with how much more I heard.

I'd say that 192kbps is much better and the 320kbps that the author advocates is basically transparent.