DS, are you sure about this? Its probably true that Penn has more CBT didactics than most and of course Beck and daughter are there, but as with almost all the other programs I visited, Penn gives its residents a psychodynamic case in the second year before other modalities of psychotherapy are used. [Actually, MGH was the program I saw that offered CBT the earliest-- during their partial hospitalization rotation.] The third year supervisors at Penn are psychodynamic:CBT in a 2:1 ratio. And the assistant PD, Dr. Sommers, has spent his career in psychoanalsis/psychodynamics, and is collaborating on a book with Jacques Barber on the subject.
The main difference between Longwood and Penn to me (I didn't apply to Cornell) was that Penn struck me as much more academic with more oppotunities to get involved in research. Longwood seemed stronger in community psych and its breadth of clinical exposure.