Well, there are always going to be times when a particular strategy works better then others. In terms of martial arts - I can think of any number of situations where communicate first wouldn't be the best option.
Chris, it depends on how you define communication. To me it does include either hissing or screaming, whichever is appropriate, "get the f*** away from me" - as well as an entire spectrum of non verbal communication from glares to postural changes to - as they say - smacking a donkey over the head with a 2x4 to get its attention. I do believe in de-escalating whenever possible but to me the essence of effective communication of ANY kind is clarity to minimize as much as possible the risk of misunderstanding.