I assumed that in this context 'successful' just meant 'met their funding targets', as opposed to 'successfully delivered the promised product/service in a timely manner'.
Thank you for pointing out the numbers. I guess I should clarify: I wonder if the spike in the volume of Kickstarter projects has any impact on the percentage of successfully completed projects. My prediction would be that the percentage of finished projects declines a bit in 2013. Again, I hope I'm wrong.
Art 49% Comics 46% Dance 74% Design 40% Fashion 26% Film & Video 41% Food 38% Games 33% Music 56% Photography 36% Publishing 30% Technology 38% Theater 67%