I’ve always wondered about such programs. The latest one I heard of was Sport Pilot in a week.
This is encouraging in one way, in that it fosters interest and excitement in aviation. In addition, the short time and the financial commitment doesn’t allow the student to loose interest, or get sidetracked by other external factors.
The problem as I see it, is a lack of percolation time for higher levels of learning, combined with a lack of diversity in training. Any student needs time to comprehend, and apply new knowledge. In a weeks time, they can obtain a great deal of rote knowledge and skill. However, that is just not enough time to get to the higher levels of learning where one can apply it in other areas, or to derive new concepts and ideas.