This study compared data from 34 research trials of five empirically supported treatments (ESTs) with one large usual care (UC) sample on child, parent, and family characteristics for children with Disruptive Behavior Disorders. Large variations were found within and across ESTs on sample characteristics during the past two decades. Most parent and family characteristics were not reported in EST studies. Statistical comparisons between UC and EST samples revealed that occurrences of child demographics and symptom severity levels were similar, but occurrences of most parent and family characteristics were different, with higher rates of problems for the UC sample. Results indicate that UC clients have complex needs, with multiple child, parent, and family issues. The findings are discussed in relation to the importance of acknowledging parent and family contextual variables in implementation efforts. (Contains 2 tables and 1 note.)