In the few places I have been, the peds people had no specialized peds training. In fact, they have been junior faculty. As you may know, it is difficult to keep a busy peds only practice even in academic centers. I think this pushes the young faculty looking for a niche into the field. Usually, CNS, breast, thoracic, etc is already gobbled up when these youngsters arrive, so they latch onto the field. This is my very limited experience and may be very different in other locales. The two places I spent time did have large children's hospitals though. Many of the places I interviewed with, even at large centers, sent their residents to St. Jude's in Memphis for a rotation just to meet the minimum requirements, so I think the places I rotated had relatively large peds practices. The peds people still saw other adult patients, though.