If there is such a thing in the world of programming as getting a newbie to do grunt-work to help out with menial time-consuming tasks, then it is without doubt much more uncommon than in the world of art & graphics, if only for the fact that I have never even conceived of such a scenario.
You touch on an interesting subject here of "going back to your roots". In my personal habits, there is definitely a parallel to this. Whether it be in mathematics, programming, or competitive sports, I always like to keep an eye out for new people - see if I can spot someone smart, with potential. It's always very tempting to try and create a "mini me". I'm often attracted to new people who show a lot of intelligence but maybe aren't very hard-working, or very successful for that matter. But it's not like I'll high five them and congratulate them for being lazy and inconsequential like me, instead I often like to be strict with them and try to steer them away from things that went wrong for me in my own journey. [1]
I've had several cases like this to some extent. Usually someone 1-2 years younger than me who I'd like to see becoming my self that I hoped for. In school there was a kid who I found to be pretty smart, I'd often challenge him with math problems and logic riddles and it was very satisfying. In starcraft I had two cases of players younger than I that I tried to nourish. As for having a mentor, I don't think I've ever had one and I think I could've really used one in math. At some point I felt like Gust was sort of trying to mentor me; at some points he'd give me problems to work on, and sometimes he'd teach me random math things he found cool, before I even got interested in mathematics.
I get a very strong feel that Gust is also one of these people that wants to find a younger version of himself and grow him. He was pretty infamous for being a jerk to almost everyone, surrounding himself with a select group of people that he found worthy of intellectual exchange. Or at least that's what it looked like to me. All I really know is that he made good friends with delta.
This is also the mentality I lived with most of the time, maybe because I read Ender's Game too many times as a child. Regardless, it didn't really take off for me, I never really had more than one friend at any given time in whose abilities I had high trust.
[1]So... in other words, with the strong emphasis on "steering them away from things that have gone wrong for myself" aside, this is also called .. the mentor & student relationship. This is something I see to be very common in mathematics. I suspect it is significantly less common in the general field of "programming" if not only because it's much less academic and more chaotic and free. and also more money-driven rather than driven by the pursuit for knowledge.
I annotated my own post because I couldn't figure out where to fit this last paragraph.
I think this should sum up my take on the "nurturing new talent" subject.