This is new bit of scuttlebutt re attendees of DL's ATP-CTP course. First I've heard the term, Silver Bullet, so I don't know if it's a formal thing.
If it just gets your app pulled and scored for competitiveness, a rec email from a DL employee to pilot employment will do the same thing without the uncertainty. They formally state that such an email
WILL get your app pulled and scored within 30 days. No promise of results, of course.
Seems this guy says it's a thing.:
From post #9956
Current/Former Delta folks:
"Looking for a little professional guidance/advice in regards to applying. I'm sitting at 1700TT and only 360PIC, all of which is turbine, and mostly multiengine. After doing the Delta ATP-CTP, I have a "silver bullet" that will get my app pulled/scored very quickly compared to the normal process or even the internal recommendation."
https://www.airlinepilotforums.com/d...-news-996.html