NPD's quarterly gaming sales report says digital distribution is behind the gaming industry's current momentum. For the months of July through September, digital sales were at $1.4 billion, a 22% increase over the third quarter last year. By contrast, sales of shrink-wraps declined by 16% year-over-year. Physical sales remain in the lead only when the used and rental markets are taken into consideration. A broader look at the video game industry reveals a bit of stagnation, as overall sales have declined by one percent when compared to Q3 2011.