I think that's fair on its own, I am not going to jump on someone for innocently using an outdated term that they don't understand, especially if they are receptive to attempts to do something about their ignorance.
However, a man like Greg Dyke, in an office like the one he has, shouldn't have to learn these things on the job; up-to-date knowledge of social issues have to be embedded in the requirements of the role. It does nothing to mitigate the notion that the people running the game are out of touch with everyday issues and nomenclature.