To be clear, I’m talking about business communications here (as was the article), not other kinds of writing.
In my field, at least, this is a fundamental concept that differentiates some of the best communicators.
Particularly as often the same message will be sent to multiple recieients that have different needs.
Of course you should try to structure the message so that people don't necessarilly have to read all of it.
For instance I recently sent a message about an analysis of the feasibility of changing a piece of hardware to a group that contained
* Managers * Hardware developers (in charge of implementing the hardware modification) * Software developers (in charge of adapting the software to the new hardware)
So it started with a brief summary of the idea and conclusion "yes it will work" (for the managers).
Continued with a some comments, questions addressed to the hardware team "the aproach is fine but we still need to sort out X,Y,Z"
And finished with a detailed description for the software team of how we should integrate the new hardware whilst remaining compatible with the existing.
If you've written things well you can get the best of both worlds. I noticed this in the author's review example. The first paragraph gets a reasonably high resolution description of the problem, then the detail follows in the next paragraphs.