This article completely misses the point of CodeSchool. CodeSchool's best selling point is exactly what the author is complaining about. I know how to program, I know how to design and analyse algorithms and I know my data structures inside out. I don't, however, know the best way to test Rails applications. CodeSchool provides a really accessible way for programmers to stay on top of the latest technologies, frameworks and idioms. It is not intended to replace a CS degree/education and I'm not entirely sure where the author even got that idea from.
