I'll be very interested to see how this goes. In a former life, I worked on developer tools and as part of that we did some extensive on-site filming of experi

I'll be very interested to see how this goes. In a former life, I worked on developer tools and as part of that we did some extensive on-site filming of experienced developers, in order to do some new product development (I think we used 10 years of professional development as the minimum bar). I don't remember the exact numbers, but it was over 75% of the time was spent reading code - just navigating, stepping through a debugger (without making any changes), and just staring at huge piles of code.