Yes, the testing/deployment cycle for Enterprise is totally different. We usually release a major version with new features every two/three months, and 2 or 3 minor versions with bug fixes in between.

We always keep the version of github synchronized with master for development/testing, although we only release master directly in major releases. For minor releases we avoid to include major features from github to keep it as much stable as possible.

I'm prodding the Enterprise team to blog about this :)