The last year the Crimson actually covered SAT scores in detail - legacies had higher SAT scores than the average applicant. https://features.thecrimson.com/2015/freshman-survey/makeup-narrative/ Note that their scores weren’t as high as the average Asian score. They could still be getting a bump compared to specific groups.
My younger son who was lopsided verbal high did much better than we expected in admissions, which leads me to think that very high verbal scores and an interest in non-STEM subjects - especially for males - make actually be a bit of an advantage.