Also, from my own experience I can't really tell if I'm actually typing/coding faster faster since switching to Vim/Spacemacs, but I did notice a significant change in achieving and staying in a state of flow. Not having to touch the mouse or consider how a text transformation should be done (but just doing it mechanically) helps me stay in the zone. YMMV.

That article is incredible. I use vim pretty much exclusively and this reminded me of some stuff I don't use enough.