There are other factors though. Say a girl does 5 shots back to back on an empty stomach and blows a .23. She may be blacked out from that much alcohol flowing to her brain that quickly. Then you take an alcoholic who has been sipping beers for the last 8 hours. He might also blow a .23 but never lose consciousness
These aren't just some random symptoms that somebody wrote out on a website...this shit has been studied over and over again....thousands of tests. Hell, I remember a couple of buddies got to go to the police station and be a focus group on booze and how much it took to hit certain levels of BAC.
.23, if it was taken at the time she went to the hospital, means it was even higher earlier in the night. Which means she was REALLY hammered. But if it was at peak, that's still drunk. And we're not trying to determine what it would do to a man's body...it's a woman. .23, no matter what way we slice it...is hammered for a woman.
You bring up a great point...if she wasn't impaired, Then was she injured? Are her injuries consistent with that of a rape victim? That's gonna be the kicker.
I actually know what I'm talking about here. This is new...
Any doctors or anyone else with better knowledge please correct me if I'm wrong, but as far as my Biology education this far has taught me:
Most of the factors you just referenced are out of the picture once the alcohol is in the bloodstream. Men have enzymes women don't in the stomach, which is one big reason the same amount of alcohol consumed hits women harder- on average, only half the alcohol will reach a man's bloodstream compared to a woman's. Additionally, men have higher body masses, and higher muscle:fat ratios, both of which mean more body water, which dilutes the alcohol in the bloodstream.
So a woman at .23 and a man at .23, all else equal, are equally impaired. My impression is that the major factor would be your personal tolerance- for example, the brain can get used to the presence of ethyl alcohol, to the point that binge-drinking college students (or others similarly used to alcohol) can use alcohol by-products as an energy source in the brain, while those without such experience cannot. The more you binge-drink, the more efficient your brain gets at getting energy from alcohol byproducts. Moral of the story, her sex really has very little to do with it since we know her BAC, as opposed to how much she drank. So let's put that line of reasoning to rest.
As far as the tables and lists of symptoms at specific BAC's go, I'm under the impression that those are put together with more concern about safety and less about accuracy for the average person. They tend to list the very lower limit of where a symptom is observed, as opposed to where the average person would experience those symptoms (much less a college student, who is at the top of their "game" both metabolically and tolerance-wise). It's done with the best of intentions, to discourage dangerous drinking and avoid giving someone a falsely optimistic impression of how far they can push their limits, but that doesn't translate well to accuracy for most specific cases. Anecdotally, I can tell you I've blown a .3 before (disclaimer: a breathalyzer isn't a very precise measurement) and still been quite functional (albeit blackout haha).
Regardless of all that, the family claims the detective on the case told them she was sober, and that Winston's roommate allegedly witnessed the assault. That changes the game.