When I was in college, both SICP and Knuth's books were on the recommended reading lists. I didn't buy the former until years later, but did buy Knuth's books (individually and at a time when I could ill afford them) and read them through. They are hard and it was very slow going. There's still a lot I don't understand. But I learned a huge amount, continue to do so and would absolutely recommend them to anyone with enough interest in the field. Similarly, when I finally bought and read SICP, I wondered why I hadn't read it sooner. I still read both books, along with many other "hard" books and enjoy them. I don't think I would be the programmer I am today if I had not read those books.

I disagree with the author. I certainly understand that reading "hard" books takes a lot of effort that may not seem worthwhile, but would not say they are overrated. However, like anything else, they aren't for everyone. Just those who are ready for them.