It'd be great if you would write a blog post with more details about the TDD vs non-TDD projects. Things like:

Duration of observation team size (over time) survey of team members anyone go from one team to another? Someone with perspective across both teams would be good. Domain complexity of each project Other code metrics (cyclomatic complexity, coupling, etc)

A post would be nice as a reference (as opposed to a comment here).

Not a small request, I understand, but I'm sure others would find it very valuable too.