Sounds like he lacked experience, or lacked experience with adults, It makes me wonder of they manage to be in this position in the first place, surely if one is to become qualified, one has to prove one's worth.
Diagnostic assessments seem to vary a lot in their nature and length. My private assessment was very similar, about 90 minutes - no filling in forms during the assessment, that was all done beforehand. My mum came with me, but he asked whether I wanted her to sit in on it, so presumably her presence wasn't strictly necessary. He didn't seem to go into much detail about my childhood and on the surface, the interaction seemed more like an everyday conversation, I wasn't drilled with questions, but I rather think he was probing to see my reactions to questions, watching my body language or leaving social cues and seeing whether I picked up on them. He did ask me some things that I found hard to answer. When the report came, he had picked up on quite a few things.
Diagnostic assessments seem to vary a lot in their nature and length. My private assessment was very similar, about 90 minutes - no filling in forms during the assessment, that was all done beforehand. My mum came with me, but he asked whether I wanted her to sit in on it, so presumably her presence wasn't strictly necessary. He didn't seem to go into much detail about my childhood and on the surface, the interaction seemed more like an everyday conversation, I wasn't drilled with questions, but I rather think he was probing to see my reactions to questions, watching my body language or leaving social cues and seeing whether I picked up on them. He did ask me some things that I found hard to answer. When the report came, he had picked up on quite a few things.