Brad Skow, On the Meaning of the Question, 'How Fast Does Time Pass?' (PDF): 'There are philosophers who think that some views about the nature of time can be refuted just by asking this question (in the right tone of voice). Others think the question has an obvious and boring answer. I think we need to be clearer on what the question means before we can say either way.
'In this paper I will examine several different questions, all of which have some claim to be precisifications of the question, “How fast does time pass?�?'