This process seems to be available to regular apps too now. When Apple rejects an update, they ask whether it's a bug fix update you need approved quickly. If yes, you can resolve the identified issues with the next update.
They started mentioning this in the past few weeks when I was updating clients' apps.
it's a little different. In our case we were circumventing requests to make changes to the app to get approval. We were effectively getting a free pass to ship the version with a possible App Store rule breakage, this one time, and getting it approved super fast.
They started mentioning this in the past few weeks when I was updating clients' apps.