I suppose my judgement of Pitt's work is that it is thorough (within the limits identified above), sociological, entirely secular (appropriately so, given his assumptions)
Richard N. Pitt is an Associate Professor of Sociology at the University of California, San Diego. A scholar of both religion and higher education, he is the author of Divine Callings: Understanding the Call To Ministry In Black Pentecostalism and Double Majors: Influences, Identities, and Impacts. His research has been supported by the Ford Foundation, the Louisville Institute, and the National Science Foundation.