Weird TDD report

Someone pointed out this interesting research report from Microsoft Research about TDD.

The research report claims that TDD results in higher quality, but that it also results in an increase in development time. This sounds rather surprising and weird to me.

When reading the article, however, a few lines are kinda weird. They seem to suggest that they use TDD, the microsoft way. This means, write all test cases and then implement all of them, which is a huge misunderstanding of what TDD is and how it works.

Interesting sentences:

• "The projects also took 15% extra upfront time for writing the tests"
• Figure 3 is interesting... certainly not a continuous integration environment
• In the conclusion: "while the development of both systems utilizing TDD took extra time upfront"

These sentences make the report very uncredible.