Piotr Jamróz at 2012-08-08 15:26:14:
White space is a break. It's like eating. Can you swallow whole chocolate at once? I know people than can do that ;) but it tastes better when you take a small bite and enjoy it. It's how you can really feel it.
It's how human brain works. It takes an amount of information and "eats" it. Long paragraphs, long sentences make them harder to read and understand.
I also think that well formatted text, separated paragraphs, not many long dialogues make your screenplay more beautiful - every page is different, every page has its own structure. Take a random page of your screenplay. Look at it just for 1 second. Can you recognize which scene does it describe?