Our entire CS Department runs on these. We're a primarily Linux-based department that emphasizes Linux/UNIX development with C. With these keyboards and the support of the department, I don't think we've ever graduated a student that didn't at least have a basic understanding of how to use vi.
They are very decent keyboards in my opinion; small and pleasing to type on.
I would have loved to include the Happy Hacking Keyboard on the list. It's one of my faves - but that said, the list is based on nominations and votes. It may be a joke, but it's a joke based on hundreds of nominations from readers, so there's that.
A well-researched article/list would have produced a valuable resource. This is true for all high-end electronics. Apple makes beautiful garbage when it comes to keyboards (and mice). They make this fundamental mistake of applying to human interfaces an aesthetic perfect only for storage and other static equipment.
That list is a joke btw.