The problem with proving rape with very young children is firstly, female sexual organs are not developed so penetration is hard to establish, and also, the children are unable to say definitily whether there was penetration or not, only that there was pain.
Unless there is physical evidence, which is rarely the case, it is very hard to establish. Verdicts of this type are not unusual.
Regarding her comment at the end of cross examination that she had made it up, there was other evidence to support what had happened, including the defendant's own admissions, and that of eye witnesses.
Children are very suggestible, particularly when under pressure and dealing with matters with which they are not comfortable. Any one with children knows that they eventually give an answer to make something or someone go away.
Prior to the human rights act coming in, very young children were not deemed to be competent witnesses - so unless there was other independent evidence, cases of, say abuse, never got anywhere. The Human Rights Act determines that everyone is entitled to protection from physical or sexual abuse. This put more pressure on the courts to hear young witnesses.
A well known example of such a case was the young sister of Baby P who was raped when she was just 2. Her verbal testamony against the defendant was accepted, even though she was only 3 at the time of giving evidence. This would never have happened pre Human Rights Act. She would have been automatically disqualified because of her age. The defence tried to argue this very point on appeal. The appeal was kicked out, the Appeal court saying a warning to the jury on the possible unreliable nature of evidence from young witnesses was sufficient.
People who say this case should not have been brought should look at the alternatives. Yes, other countries do not prosecute such young people, but equally, are more radical with their interventions into peoples lives.
The boys in question will in all probability get a Supervision Order which will involve undertaking an intensive programme regarding sexual issues. This will be onerous. I don't think anyone is arguing that the behaviour these boys displayed was anything other than extremely concerning.
Would anyone consent to their child undertaking such a programme if they hadn't been convicted of a sexual offence? In this country, the answer would be a firm 'no'. And so, court proceedings are used to unlock the intervention that these boys need.