Not always that easy.
At my son’s public HS (rated #1 public the last time the WSJ rated HS) the three year cumulative Naviance reported admissions success rates at Harvard were 50% EA 20% RD vs Yale with 24% EA, 22% RD. The ovious thing based on the numbers would be to apply H EA and Yale RD, but…
Asked the Guidance Dept. chair for their take. Was told: maybe H just gives more weight to locking in the bright kids early. Specifically asked about legacy, was told that the school didn’t know.
Fast forward to a reception at the NYC Harvard Club for Early Admit students and family. 8 out of the 10 kids from his HS who were admitted EA were legacy or double legacy, or legacy + recruited athlete. (Seemed about the same for the overall group at the reception, not just my son’s HS contingent)
No way to find out from Naviance, or the HS admin.
Note: this was as of 2015