I think I understand the question. I have a 4 stripe purple belt in my gym that I've known since she was a blue belt. She possesses technical knowledge way more vast than mine, however, if I was to go gorilla mode on her with the attempt to destroy, I believe she could not keep up. I'm a blue belt now, but this truth extended into my later white belt days.
What Noodly master is experiencing (I think) is females who are generally a notch lower than their male counterparts in terms of abilities. It's very common and it's as simple as rolling to the death with one belt and being more technical to another. This doesnt just apply to women, some guys lack that warrior spirit or strength and are a notch below guys of equal skill.
Back to the matter at hand, female blackbelts. I've never met one, but I understand the notion that a 130lb female blackbelt is the equivalent to a 130lb male blackbelt. I've met one non blackbelt woman (another purple), and she wins many local tournaments and has gone to worlds. Whenever I roll with her, there is not a difference of rolling with a man or her. I give it my all and she crushes me every single time.
I get why the question exists, and I dont want to comment on female blackbelts because I dont know any in real life, but I have a feeling my observations with my training partners would translate to blackbelt