Speakers need this much more than presentation training-

I’ve mentioned Orwell before- See here.  And it’s still my view, as a speechwriter and presentation coach,  that if more speakers followed these rules than the kind of stuff we tell them on training corses, the quality of corporate presentations would improve beyond measure. They’d be-

Shorter
Simpler
Easier to understand

For a simple explanation of the ‘rules’ see this great, and literary, blog- George Orwell’s 5 Rules for Effective Writing | PickTheBrain | Motivation and Self Improvement.