What do I think of a typical speaker’s response, “good question”?

Good question.

I feel that when a speaker says “good question”, the response often falls into one of the two categories. The presenter doesn’t know the answer to the question or the question happens to be something s/he knows super well and likes to talk about — if true, the question itself is rarely actually considered to be a ‘good’ question when it’s said to be a good question.

I like to think about this response.