integrated ATPLs are typically programmes with the most continuity of training and the best support systems in place to help failing trainees
I'm not sure I'd agree with that last statement VariablePitchP. In my experience, integrated ATO's tend to push the underperforming student between pillar and post, convening hearing boards and progress reviews resulting in additional training at cost and often with little by way of continuity in this extra training, frequently with other instructors to the student's usual one (which can be beneficial), and once the student has fallen off the 'production line' and is no longer on the daily planning schedule, confidence is often adversely affected, they fall further behind his or her classmates and the goalposts seem to get further apart. Failing to solo is where I've seen the greatest number of dropouts but it does happen elsewhere in the syllabus and is not uncommon contrary to popular belief, even among selected students.