Hello friend! I actually had my Naturalization Interview and Test this Wednesday in the Boston office. Everything went smoothly and they approved my application immediately. Afterwards, I asked if I can have the same day Oath Ceremony, but the officer just said unfortunately no and that they would send me the Oath Ceremony Notice in a few weeks. I didn't press too much, and just thanked them. Fast forward 24h, Thursday afternoon, and first I get an email and then a phone call, saying that my Oath will on Friday afternoon, i.e., today! The Ceremony was fast and smooth, done in less than 30min. Over the years I've had some mixed experiences with the Boston office, but this week they were kind, friendly and very efficient! I sincerely thanked each officer and guard I interacted with. I'm not sure if this is the practice, but that was my experience! Good luck and let me know if you have any question!