My point was the previous post content was too little information to draw conclusions about strength of ED boost. The same is true for drawing conclusions at both the HS level and the national level.
As I’ve stated in other posts, I believe the HS feeder or other special connection influence is often overestimated, and instead when HSs have a large number of admits that large number primarily relates to some combination of a huge number of applicants, a high rate of hooked students among those many applicants, and a high rate of especially well qualified students among those many applicants, often due to the HS being highly selective.
This relates to my earlier comment about needing more information about such factors to separate influences from ED from differences in number of applicants, rate of hooks, and rate of highly qualified applicants. For example, suppose a particular HS had several ED acceptances and 0 RD acceptances. If those ED acceptances all were hooked students, then it says very little about the relative preference between ED and RD. However, it may be suggestive of a preference for hooked students, if there were many unhooked applicants with similar or greater qualifications , and few similarly qualified hooked students in the RD pool.