Thanks for the response, and apologies for misrepresenting your results somewhat! I'm probably not going to change the title since I am at heart and polemicist and a sloppy thinker, but I'll update the article to call out this misrepresentation.

That said, I think that what I wrote more or less encompasses three of the factors you call out as being likely to contribute: "High developer familiarity with reposito- ries", "Large and complex repositories", and "Implicit repository context".

I thought more about experimenting on myself, and while I hope to do it - I think it will be very hard to create a controlled enviornment whilst also responding to the demands the job puts on me. I also don't have the luxury of a list of well scoped tasks that could feasibly be completed in a few hours.