If i wasn't experienced in computer science this would all fall apart however i do have to fix almost all the code, but spending 10 mins fixing something is better than 3 days figuring it out in the first place (again this might be more unique to my coding and learning style)
Do I think those rise to "case studies"? No. But to another commenters point, detailed and rigorous case studies have always been hard to come by for any productivity process or technology.
I also think that article is hype, but it's not true that it's vague.