This article is an invited commentary and analysis of the authors' completed systematic evaluation of Child Protective Services (CPS) differential response (DR) models. I write this commentary based on 25 years of public child welfare experience followed by 13 years as a social work professor and researcher. In their review of DR, the authors' identify critical and unresolved issues in DR implementation and program evaluation as well as recommendation to improve DR within CPS. In the course of the authors' evaluation, they completed interviews with key informants in states that have implemented DR; an important contribution to CPS literature. Concepts, issues, and controversies in the DR literature are discussed in view of CPS practice models and history of policy making.