[ihsw]

Personally I'm a big fan of breaking down barriers between the front-end and the back-end (and the language barrier is pretty big), but coding for the browser and coding for the server are vastly different. Those accustomed to pumping out jQuery all day aren't going to be contributing well to the world of Node and Express.

[Cthulhu_]

Won't they? At the very least, the code examples, structured nature, emphasis on async programming and a lot of other things will make jQuery devs become better jQuery / front-end developers.