It's at times like this when I'd love to be able to hear what went on inside the jury room, but anyway.
If the woman is drunk beyond the capacity to make any kind of decision, then she can appear as enthusiastic as you like at the time -- but she's deemed to be incapable of giving consent because she's not truly aware of her decisions. Therefore, in the case you describe, her shouting "thunderbolts and lightning", or "harder, harder!" does not necessarily mean that she was truly consenting, or capable of it.
So in that sense it's certainly possible for her to have consented and shouted something indicating pleasure, and have been incapable of consent and said the same things. On the latter occasion it would have been rape, although perhaps it might be harder for the jury to consider it to be so beyond reasonable doubt. Seems to me that the question is, "is the doubt so prompted reasonable, or is it a distraction?"