In the author's defense, I came to the same conclusion using Dvorak when I was a teenager learning unix and programming. I switched back to QWERTY for a while, but around 8 years ago I learned about Colemak and switched and have been very happy with it since.

One thing I like about Colemak is that it is close enough to QWERTY that I can still type on QWERTY by looking at the keys and not look like a complete fool. Dvorak is so different that it completely rewires the brain and it's very difficult to switch between it and QWERTY. That's been my experience at least.