I'm not aware of that. They did sustain the loss of one resident taht sounds like a "OB is the wrong field" realization rather than a transfer to another OB program. At Jeff, the nationwide average for this type of OB loss is 10%.
Drexel is a solid program with impressive leadership in place with Dr. Woodland as program director and Dr. Montgomery as chair. PM me and I can tell you more about the program/interview.