Yes, definitely. I hope my comment didn't come across as criticism! I love seeing sites like your kid's.
I was more lamenting the general difficulty of the problem. (And possibly just the lack of books that are suitable for kids who are advanced at reading, but have interests similar to other kids their age.)
Not taking it as criticism. I totally agree with you.
I think as a parent of these advanced kids it puts more onus on the parent and kid to work together to identify appropriate books based on these reference points.