Though less prevalent, even people in developed countries do this (short course). Slightly off-topic, but with the "complete" and "short" courses now available

Though less prevalent, even people in developed countries do this (short course). Slightly off-topic, but with the "complete" and "short" courses now available (e.g., a complete lasts only 2-3 days), how is resistance affected? Is it better, worse, or the same? Better, since people are more likely to complete a course?