Productivity isn't about doing things faster as a lot of people erroneously believe (that's efficiency). Productivity isn't just efficiency * time_spent_working either.

Productivity is about how quickly you're progressing towards your high-level objective. Having a knack (or methodology) for knowing what to do is way more important than doing things fast.

Well, I think the author correctly identifies productivity as a vector instead of a scalar.

But perhaps a better title would be "Productivity Isn't (Only) About Going Faster"

productivity is meaningfulness but for somebody else.