That doesn't surprise me - every woman is so different, not just in past experience, temperament, and level of sexual baggage, but physically, as well.
However, I would put money on the guess that most women don't speak up during cunnilingus for two main reasons:
1. We were taught not to speak up for our own needs, particularly during sex.
2. So many of us have had experiences in which a man blew up or ended a sexual experience because they felt our suggestions were criticism.
I don't mean any of this in an antagonistic way - just as something I hope is helpful to men as they navigate this sometimes sensitive encounter in order to make it more relaxing and satisfying for everyone involved.
I think we are evolving toward a very different world and I'm excited to see that. Thank you so much for reading and commenting!