Or put simply, you train people to the standard required to pass the test however long that may take
AMC FCL 1.740 (b) Once the ATO has determined the needs of the applicant, it should develop an individual training programme that should be based on the initial training for the issue of the rating and focus on the aspects where the applicant has shown the greatest needs.
So ultimately, the decision is down to the ATO, where the HT will have more relevant knowledge and experience than a clerk whose only contact with aeroplanes is to look out of the CAA window!