Faster is used both in the context of time spend and rate. In sports for example we say someone was x seconds faster across the course all the time. There reall

Faster is used both in the context of time spend and rate. In sports for example we say someone was x seconds faster across the course all the time. There really is no definition that ties faster to only be associated with rate, so I would say this is just pointless nickpicking. It's like complaining that people use higher/lower when talking about price