As CABAIR ceased trading in October 2011, nearly nine years ago, the relevance of this historical information although interesting, is somewhat diminished, if no longer valid.
Sound training within the first 20 hours or so is absolutely critical. The fundamentals of being able to select the prescribed attitude, with accurate trimming, cannot be over emphasised.
You need these basic skills even more so in the MCC/APS phase.
It must not be a question of trying to get someone solo in minimum time, or teaching them the basic pre solo exercises whilst flying the circuit.
Get the basic elements correct, and the RED scores will turn GREEN when QUALITY training is undertaken, even in busy schools.