What he suggests is what I do as naturally as a fish in water. Skimming the details, finding my answer, and racing off is my greatest skill. But, lately, I have realized _my_ 10x gains come when I bite the bullet and deeply learn a technology. It is against my nature, and takes real effort, but that is where my biggest gains are.
If you read this article, snort, and say, "duh", try getting a book on a tech you use and reading it cover to cover a few times. Try programming without internet for a few hours. I've been doing this lately, and my normal cycle of hitting Google every ten seconds to remember (is it length, count, or size...) has slowed significantly, which keeps me in flow longer. I get pulled out of flow less and I have learned some really useful features of my stack that I previously would have never learned.