The slightly hard to follow conclusion from the same piece -
"However, The Observer's investigation reveals that fewer than a third of the 20,000 people acquitted of serious offences in the Crown Court last year owed their freedom to 'not guilty' verdicts by judges, not juries. Cases were often discharged by judges, usually when the prosecution decided not to proceed - because cases were not ready, because victims or other witnesses withdrew or had been intimidated, or because Crown Prosecution Service lawyers decided that the evidence was 'unreliable'.
The answer, said judges, was not to make sweeping changes in the law to reduce suspects' protections, and hence risk wrongful convictions, but to find ways of getting the CPS and the police to work more closely together when investigating crimes so that the evidence is more watertight."
So maybe we can blame the police and the CPS - and while public opinion about rape myths may play some part in decisions that a case is unwinnable, it seems that there are wider problems. According to judges anyway.