The way I heard it, is kids who in high school get really excited by technology, and join the robotics club or "mouse squad" or electronics club or whatever, get to college and are immediately slapped down by the intense math courses in STEM programs... and lose their interest. The comments on the article you linked alluded to this but didn't quite say it this broadly. Apparently some colleges are aware of the negative impact of this and are thinking on how to address it.