I don't think there will be meaningful slowdown from taking a 'good developer' with a lot of experience in Rails and throwing them into Django development. It t

I don't think there will be meaningful slowdown from taking a 'good developer' with a lot of experience in Rails and throwing them into Django development. It takes very little time to figure out the proper way to do something when you're already heavily versed in the core concepts and ideas behind what your doing, in this case MVC web development in an OO imperative language. Where this doesn't work as well is when you take a 'good developer' who's worked mostly in C++ writing game engines and throw them into web development using Clojure. It's hard to figure out the proper way to do something when your not even sure what your trying to do, or what terminology to use to efficiently google the question. I think the author is primarily referencing the former situation, not the later.