The only reasonable answer to this question at this point is that - aside from the alleged victims and Assange himself - nobody knows. Unless an investigation has run its course and, possibly, a trial has taken place, nobody is justified in offering any judgments. We weren't there, so we can't know. What has become sadly obvious, though, is how powerful sexist myths and attitudes still are. Even seemingly progressive people like Naomi Wolf and Keith Olbermann have made nasty sexist pronouncements on a case they only know through rumor, tweets, blog posts, and tabloid articles.
To say that rape is a crime that goes massively underreported everywhere in the world is an understatement, if there ever was one. A woman who reports being raped needs to prepare herself for a victim-blaming assault that will shame her, analyze her "motivations," her sexual history, her clothing choices, drinking habits, and as we can see in Assange's case, even her travelling history, her tweets, and e-mails. Rape is an egregious violation of human beings. Of course, this simple truth is accessible only to those who manage to remember that is has now been scientifically proven that women are human beings. If on hearing that a person reported a rape your first reaction is to analyze her "motives," then I have news for you: you are a sexist jerk.
In short, the rape accusations against Assange have proved to be a very reliable jerk-meter. Many people who seemed completely normal and even progressive have revealed their deep-seated sexism. Anybody who believes that feminism has served its purpose and there is nothing for feminists to fight for any longer needs to think again. Women who report being raped still need to be prepared to be vilified and judged, often even by some losers who believe they know all there is about a rape that allegedly took place on a different continent.
People who have been pouring over every nasty tabloid "development" of this story need to get a life already, let the investigation run its course, and in the meanwhile think about why hearing the word "rape" makes them react in unhealthy ways.