[the_af]

To be honest, I found this to be an unfortunate example, especially when mentioned in the same paragraph as writing tests. Knowing all the shortcuts in VIM -- in fact, using VIM at all -- has very little impact in software productivity and quality. Remember, how efficiently a single programmer types matters very little, because that's not where most time in software development is spent, or where most problems arise, for that matter.

[c22]

Learning vim commands won't increase how fast you type, it will increase how fast you edit.

[the_af]

Again, does it matter how fast you edit when compared to spotting what to edit, which change to make, and how to explain it to your teammates? I think it matters very little. Obviously, if you're so slow you it drives your teammates crazy then it becomes a problem, but really, I don't think the difference lies in learning VIM's shortcuts.

[thesz]

But it does matter how efficiently he navigates.

And this where vim can shine.

Although I prefer structuring the program, not using structured editor.