I saw the interview as well and thought exactly the same thing. He was being very careful in what he was saying and even forgot the question he was asked from Philip at one point I think and appeared to be extremely uncomfortable and very tense.
But hasn't he always been like that in interviews. I know someone who knows him through work and said he is very boring but I realise that is just her opinion and others would say differently but he has never been a bundle of fun in interviews. Maybe DVO is starting to find him boring too