There has been some confusion as to when new nuggets can assume the rank of Ensign. According to Command, immediately. So once you send your scores off, you can assume the title of Ensign and use it on your homepage and messaging.
Lt. Michael "Mik Mo" Morelock
Commander Air Group
Seekers Squadron Commander
Nuggets start at the rank of Ensign when they join any squadron as a pilot whether they ever take their exam to earn their wings.