I agree with the sentiment of this article, but strongly disagree with the title, and the advice to learn to type fast. The title is abuse (or misunderstanding) of the word "currency". Currency is an accounting mechanism. Time is, well, something else. It's an incredibly valuable commodity, a necessary (but not sufficient) ingredient for any activity and hence any kind of progress, and one which you cannot make more…
That's kind of sad. The most productive 2 week class I ever took was a touch typing class in 8th grade. We learned on mechanical typewriters where you really had to hammer the keys. This has paid off for me enormously.
> quite slow by coder standards
I spend very little time typing code in, that's not where my typing time is spent. For example, I am typing this while looking at the screen, not the keyboard. I catch and fix mistaeks much faster. When I'm transcribing text, touch typing doubles the speed because I read the original while typing.
I also try and optimize my code for readability, not minimal keystrokes.