I agree, it could have a disclaimer that it isn't for absolute beginners.
I personally felt like I'd learned something, maybe it had targeted weaknesses.
By saying 'engaging' I was trying to be helpful. Your brain will retain information that you have personally discovered through experimentation, and attempting to dissect how someone approaches a task, a lot better.
I found this tutorial particularly helpful due to the changing of the original design over the course of the images. It shows the artists experimentation. I do agree, like I said, that someone who has just entered the photoshop world might be left bewildered by how this could be useful due to their technical knowledge of the software being limited.
So, it would have been even more useful to add information such as the layers and brushes used. But on the flip side, this might deter an artist with more knowledge by rehashing information that you learn about photoshop after a few weeks.
I think it's being viewed as a tutorial teaching technical knowledge, when really it's teaching fundamental art and compositional construction knowledge...
Too much emphasis is placed on brushes, brush settings and photoshop voodoo by people. I don't see anything wrong with a tutorial that focuses on the thought process of an artwork, personally.