It is true that most game-industry positions aren't really for designers, but these days a large number do involve some amount of design, especially if you want the game to be unique in some way. For example, AI programmers are in an odd position of doing "just implementation", but implementing a system that deeply impacts what kind of gameplay and design is possible (in some cases they quite literally write the tools that the designers will use to do things like write NPC behavior).
http://en.wikipedia.org/wiki/Warcraft_Adventures:_Lord_of_th...
I totally agree. In my experience, the HV people the grandparent post refers to are capable of lots of "professionalism" but only when they care about their projects. The difference is how productive they are when they have to work on something they aren't passionate about.
Like I said, I'm "middle-variance". I swing between 4 (minimal acceptable) and 8 (max. sustainable). I can keep a 6+ going when I'm not passionate about a project but don't mind doing it, especially if I can see it leading to something better in the future.
I was high-variance when younger but I learned to become middle-variance over time. It's a necessary aspect of career maturity. So I probably swing between 4 and 8. I can hit 9 but it's not sustainable (although today's 7 was the 9 of two years ago for me) and before I find myself anywhere near 3, I do everything I can to fix the situation (possibly getting another job).
I'm not sure that I'm convinced by this model. Truly great work is often a result of consistent professionalism combined with ridiculous productivity.
Consider jashkenas, for example: Over the last few years, he's written an impressive number of solid, professional libraries and released them as open source. So he was working from a high baseline, and he gave himself lots of chances at success. Sooner or later, he was bound to write something 1 or 2 standard deviations better than his personal average.
I'd say that CoffeeScript is at least a 9, but it's an outlier from a pretty large group of 7s.