I'm strongly in agreement with this, presuming that you have the facts and thinking on "your" side. If you're trying to sell air or otherwise have unavoidably the skinny side of the facts, you are probably better off taking your chances with a flashy presentation than a long-form document (which is much more likely to expose the flaws in your thinking).

As the old aphorism goes: If you have the facts on your side, pound the facts. If you have the law on your side, pound the law. If you have neither on your side, pound the table.