That's true, but out of a whole freshman class at an Ivy, how many are from families as high up the food chain as Bush? My assumption is that while legacy provides a leg up and/or acts as a big tie-breaker, there isn't a very big % that is getting in based strictly on their family or contributions to the alumni fund.
I'm one of six and none of us got into Notre Dame and U Chicago with our inferior grades despite Dad & Mom's degrees.