Brown sibling legacy: How much boost to admissions?

Just want to say it is probably better to focus on where your daughter would like to see herself, and I would ,not assume acceptance at some of he colleges you mentioned in your original post as “matches.” My kid got into Brown, Wesleyan, Dartmouth, some other LACs, but was waitlisted at WUSTL. At the time, talk was that WUSTL was waitlisting top candidates because they doubted they would matriculate, but I don’t know if this is actually true. All these colleges are very competitive. Due to this fact, however, if she really likes WUSTL (or any other college), it may be to her advantage to apply ED so they will know she is serious about her interest there.