@CateCAParent , I will venture a guess that this is one way in which being attractive to day students can help. Many BS are near or close to zip codes that could offer those students. They can often be the bridge between the poles. But I believe the data substantiates what you have observed.
Fwiw, several of the AA students I met through DS were FP. I mention that because there is a misconception (not implying on your part) that all the AA kids are getting FA. Definitely not true.