OK I've stayed out of this one because I don't know all the details, and for that matter only the victim and perpetrator know what really happened. However, I've seen multiple references here to to the notion that the details described in the Brennan article (which I have not read) would indicate that the allegations are true. There are other possibilities.
I know of a case in my hometown where the details were part of the case. As it turned out though, one crucial detail was false - the name of the man who assaulted the girl. When first encouraged/pushed to talk about it and report it, she was scared to name a close family friend, so instead named a more public figure, then changed her story later - after the falsely accused's name and reputation had been publicly ruined.
Secondly, as noted by some, there's a lot of easily accessible fiction and true crime out there, and the concept of copycat perpetrators is not only storytelling fodder, it actually happens. Stands to reason that there can be copycat victims too - in other words details of the crime might have been lifted, consciously or unconsciously, from other sources. Now, if those details were specific to the perpetrator (ie a scar not readily visible to most) or perhaps the location/timing then that's one thing, but specific to the incident doesn't necessarily "prove" that it's real.
There's also the consideration that the victim's story could be a hybrid of truth and not truth - because as can happen, when someone really wants to be believed they might add extra details to be heard, and even come to believe them themselves.
I really hope this victim finds justice and can move on with her life as best as possible, and that if the accused is proven guilty that he pays the full price for his crime. I also hope that even if this case is limited to one incident, that by coming forward other victims gain courage to do so as well, and hopefully take us one more step into a world where no one has to go through this.