That's such bullshit and we've seen over the last few years tons of women come forth with completely legitimate accusations that were not immediately reported. Reports shouldn't need to be made immediately.
I do not think he said there is no chance this could be legitimate, just that the time delay makes it seem less likely to him. While there are instances of people coming much later with legitimate complaints, there are also instances of people deciding to withdraw consent years later when the relationship did not go how they envisioned. We don't know the truth of what happened. Without all the facts or any evidence besides an anonymous accusation, it seems reasonable to weigh all the factors, including timing of the accusation, in determining the likelihood of this being true.
That's impossible to know since a lot come down to he said/she said. Absent physical evidence, how can you even know which ones are false to account for a percentage?Sweet. Then let's go past anecdotes and turn to statistics. What percentage of sexual assault claims are false?
EditL Also, the research you are most likely going to site is for cases reported to the police. That kind of proves TK's point. Going to the police is a bigger step, and weeds out many of the false accusations. This instance the person most likely did not go to the police, and hence the studies are irrelevant.