I just got off the phone with the FAA/AST and they have determined that my application is complete enough to begin the evaluation. (This used to be called sufficiently complete) This is the official milestone that starts the 120 day clock. Since the Application they deemed complete enough was received by the FAA on May 29th They are now legislatively bound to approve or disapprove the application by September 26th. They can still ask for a lot of information and request changes in the vehicle or safety systems, but at least the clock is started.
Here is the offical PDF (with addresses and phone numbers removed)