Yes. Absolutely. Without question. As someone who has invested years on the same editor, i have a hard time paired programming with anyone who doesn't have mastery over their editor. Things that can take 1-3 keystrokes instead take 30 seconds. Every moment spent consciously navigating or searching or moving code is time spent not thinking about the problem at hand.
In fact, i wrote an article on this very topic a few months ago because i find so few programmers consider tool mastery a part of programming mastery:
Things that can take 1-3 keystrokes instead take 30 seconds.
This kind of editor mastery is oft mentioned, but I've never seen it.
Does anyone know of a good video demonstrating editor virtuosity? Ideally while actually coding - not synthetic examples. Any editor, any platform, any language, etc.
In fact, i wrote an article on this very topic a few months ago because i find so few programmers consider tool mastery a part of programming mastery:
http://blog.benroux.me/editor-as-artbrush/