This blog, talking about the "1/10" developer as a sort of factored replacement for the "x10" developer, caught my eye over Twitter. Frankly, I'm not sure what to say about it, but there's a part of me that says I need to say something.
I don't like the terminology "1/10 developer". As the commenters on the author's blog suggest, it implies a denigration of the individual in question. I don't think that was the author's intent, but intentions don't matter--results do. You're still suggesting that this guy is effectively worthless, even if your intent is to say that his programming skills aren't great.
Some programmers shouldn't be. It's hard to say it, but yes, there are going to be some programmers at either end of the bell curve. (Assuming that skill in programming is a bell curve, and some have suggested that it's not, which is its own fascinating discussion, but for another day.) That means that some of the people writing code with you or for you are not going to be from the end you'd hope them to be from. That doesn't necessarily mean they should all immediately retire and take up farming.
Be careful how you measure. The author assumed that because this programmer wasn't able to churn out code at the same rate that the author himself could, the programmer in question was therefore one of these "1/10" programmers. Hubris is a dangerous thing in a CTO, even a temporary one--assuming that you could write it in "like, 2 hours, tops" is a dangerous, dangerous path. Every programmer I've ever known has looked at a feature or a story, thought, "Oh, that should only take me, like, 2 hours, tops" and then discovered later, to his/her chagrin, that there's a lot more involved in that than first considered. It's very possible the author/CTO is a wunderkind programmer who could do everything he talked about in, like, 1 or 2 hours, tops. It's also very possible that this author/CTO misunderstood the problem (which he never once seems to consider).
The teacher isn't finished teaching until the student learns. From the sound of the blog post, it doesn't sound like the author/CTO was really putting that much of an effort into teaching the programmer, but just "leading him step by step" to the solution. Give a man a fish... teach a man to fish.... Not all wunderkind programmer/author/CTOs are great teachers.
Some students just don't learn very well. The sword of teaching swings both ways, though: sometimes, some teachers just can't reach some students. It sucks, but it's life.
This programmer was a PhD candidate? The programmer in question, by the way, was (according to the blog) studying for a PhD at the time. And couldn't grasp MVC? Something is off here. I believe it, on the surface of it, because I worked with a guy who had graduated university with a PhD, and couldn't understand C++ and MFC to save his life, and got fired (and I inherited his project, which was a mess, to be blunt), but he'd spent all his time in university studying artificial intelligence, and had written it all using straight C code because that's what the libraries and platform he was using for his research demanded. I don't think he was a "1/10" developer, I think he was woefully mis-placed. Would you like an offensive lineman and put him as a slot receiver? Would you take a catcher and put him at pitcher? Would you take a Marketing guy and put him on server support? We need to stop thinking that all programmers are skilled alike--this is probably creating more problems than we really realize. Sure, on the whole, it sounds great that "craftsmen" should be able to pick up any tool and be just as effective with that tool as they are with any other--just like a drywaller can pick up a wrench and be just as effective a plumber, and pick up a circuit breaker and be just as effective an electrician. Right?
In the end reckoning, I don't think the "1/10" vs "10x" designation really does a whole lot--I have a hard time caring where the decimal point goes in this particular home-spun tale of metrics. And I'll even give the author the benefit of the doubt and assume the programmer he had was, in fact, from the lower end of the bell curve, and just wasn't capable of putting together the necessary abstractions in his head to get from point "A" to point "B", figuratively and literally.
But to draw this conclusion from a data point of one person? Seems a little sketchy, to me.
Software development, once again, thy name is hubris.