It counts approximately in my experience. If you tell it to use 5 word sentences it might occasionally use 6 or 7 words but it will never use 30 words. This is

It counts approximately in my experience. If you tell it to use 5 word sentences it might occasionally use 6 or 7 words but it will never use 30 words. This is with GPT-4, it's possible GPT-3.5 is much worse.