[jzm2k]

>You can also tell on company hardware and on company accounts if the junior's browsing history represents getting better or just resting on their haunches because they want someone else to do the thinking.

Are you saying the mentor should actually go and check the browsing history of one their engineers to verify whether they've actually done "correct work" or what are you trying to say exactly? This sounds to me like micromanagement of the highest order.

[throwawayfear]

What I'm saying is that they already do it and already have access to enough information to know who is making the most of a rabbit hole and who is not. Code commit frequency is sufficient in itself.