Agree. We'll make some updates to explain it better. Our hope was that the more simplistic overview would be enough. For now, you can read the blog post about it:

http://wildbit.com/blog/2013/09/17/dploy-io-our-third-produc...

It's heavily based on Beanstalk deployments, so you can also read about how it works here:

http://beanstalkapp.com/features/deployments