It took me a while to love his dialogue, but now I do appreciate the short clipped poetry of it. He uses a metronome to time out not only the delivery but the pauses between deliveries, between actors. Hemingway is a good analogy for his muscular, masculine writing -- but Hemingway is also easier to read than Mamet is to hear, just like most concepts are easier sold in books than in film. What makes both Mamet and Hemingway so effective is not one word is wasted. Everything means something vital to the story, character, or theme. Their words are pregnant with purpose in a way few other writers are.