Russell Mull shares his experience with Cappuccino, highlighting the ease and speed of using GitHub for collaboration, which he found superior to commercial systems and older platforms like CVS and SVN. After creating a GitHub account and cloning the full repository in a remarkably short time, he praises GitHub's collaboration model as a significant improvement over previous systems, suggesting it fulfills the potential that SourceForge was meant to achieve. The insights are shared by Chris Wanstrath, also known as @defunkt.