[digibo]

I read the article, but I haven't read the study. The article seems to show that the study is useless - it proves nothing, it's neither pro-TDD, nor anti-TDD. Taking a seemingly strong side of an argument supported by the study, but not commenting on the linked article itself, can explain the downvotes.

[AgentME]

If the study showed anything, it was that TDD and TLD might be similarly useful at least on short timescales. I think GP was saying that they believed tests were useful, but that it was unnecessary to strictly stick to doing them the TDD way.

[kendallpark]

So I read the study. Martin Fowler is correct that you can't make huge generalizations from the study. But the importance is that someone is actually attempting to get quantitative evidence in an argument that has been largely anecdotal for the past several years. As flagrant as DHH's keynote was, back in the day, I think he was right to compare TDD to a fad diet. Yeah, there are people that will absolutely swear by it. But we really won't know until actual studies are done.