I can also confirm that after some digging in the 2020-2021 thread, I found no one that reported being deferred and accepted, only waitlisted. I couldnt even find any deffered applicants report recieving ANY news before April. A HUGE wave of WL's for deferred applicants came on April 15th. Maybe some people that never posted heard otherwise, but maybe this is atleast reason to suspect that deferred --> A or hearing anything back before April is rare.
Also, I dont recomend wasting time digging through the previous years thread, I've found out the hard way that it only brings pain