PhD does not necessarily equal a better administration of a given test, trust me. Nor is a doctoral intern necessarily new to testing. As an example, I know a clinical psych intern with 10 years of assessment under her belt (including all standard neuropsych tests), and a clinical psychologist (in assessment) who took no assessment classes and so whose experience with testing is limited to winging a WISC a couple of times. Additionally, I know school psych graduate assistants who can test circles around their boss (a school psych now working in clinical assessment, who hasn't given a test in years).
It just really depends, and I wouldn't rely so heavily on titles. I work in child assessment (namely, neurodevelopmental disorders, along with other issues impacting the 21-and-under set) at a center with huge traffic everyday, and this has proven itself to be true time and again.
