ExAscoteer
The RAF never went to 'gaduates only' for its aircrew. Furthermore the chop rate amongst graduates (or at least those who had been through the UAS system) was way lower than it was for DEs.
You are correct overall, however in the mid 70s there was considerable disquiet at HQTC regarding the comparative suspension rates at Cranwell vs Leeming following the introduction of the Objective System of Flying Training. The CFI at Cranwell fought our corner well and HQTC backed off. Once a few courses had progressed through Valley he was seen to be fully justified as it became apparent that the Cranwell GE product was 3 times more likely to be successful at the next stage of training than the students coming from Leeming at that time.
I never liked the phrase "Chop early, chop often" as it sounded rather harsh and we were after all there to teach and get people through training , not remove them. However with the benefit of hindsight early decisions were probably best for all concerned although some on the receiving end may not have felt it at the time.
YS