Short and efficient statements are difficult to write. If your care about being understood, it takes longer to write short things than long ones. And yes, we should spend more time on writing less.
Examples
Documentation around the Caml programming language is one of the best examples I've seen. Every sentence is designed to go straight to the point, without lacking precision. Faithful to the philosophy of the language: compact, clear, non-redundant, yet expressive:
John Valentine introducing his game Zenith keeps it super short. The game is quite unusual, so better give you the big picture first:
The classic book Universal Principles of Design introduces design rules whilst remarkably applying them to itself. You read, you get it. You even hardly notice the book actually has a design. You just see what the book has to tell:
The list goes on, but let's keep it short. Your time is precious and you already got the point.
I care about the constant refinement and compression. I care about taking three pages and turning it one page. Then from one page into three paragraphs. Then from three paragraphs into one paragraph. And finally, from one paragraph into one perfectly distilled sentence.
– Jason Fried, founder of 37signals