Unclear how the numbers will shape up in RD for URM, but there seems to be recognition that ED is obviously being used more by wealthier and White or Asian students who don’t need financial or merit aid. A few articles that I’ve seen floating around:
(However, Brown also admitted the largest ED class ever in December, and that class had highest % of FGLI students in ED history. 
)
I think schools are still tweaking their ED/RD formulas in response to SC decision, and patterns we’ve seen in past may not hold moving forward.