I heard back from USC pibbs on Friday. However, my friend who's already in the program said he heard back in mid January. That was last year. So I'm sure they'll keep sending invitations.
I also applied to UCSF developmental and stem cell bio. Idk if that's part of PIBS or BMS ( a little confused). But the program director said they would send emails tomorrow. Idk if he was referring to DSCB only though.