You're right-the quote showed up in the Google summary of the page, but not the page itself. Weird.
Here is a video where Branson says he achieves "twice as much" on a day when he works out compared to a day when he doesn't exercise: http://www.youtube.com/watch?v=QFjgMKwpz_k
Here is a video where Branson says he achieves "twice as much" on a day when he works out compared to a day when he doesn't exercise: http://www.youtube.com/watch?v=QFjgMKwpz_k