1. Basic misconception - being JS developer doesn't make you a node.js developer.
2. Blogpost makes an assumption than node.js could be used for enterprise software development and shows page serving metrics as a proof. Actually IMO most of the enterprise apps are not about page serving - there are a lot of them used only by few hundreds of people in 9-17 daily basis. Backend business logic is a lot more important and the post doesn't proof in any way, that using node would be proficient in that matter.