Yup, you cannot do this without technology. To begin with, some history:
Then some info on ORP, saccade, and percentages:
Their blog has more information:
http://www.spritzinc.com/blog/
So basically, the original method - RSVP - doesn't align the ORP like Spritz does:
http://www.spritzinc.com/wp-content/uploads/2014/02/word_positioning_blog3.png
So it takes the work out of moving your eyes across the page (80%) and lets you focus on processing the content (traditionally 20%). The "technology", in this case, is an ORP word alignment algorithm combined with a digital display to flip words at a certain WPM speed.