hmmmmmm I guess you could say that, I've never looked at it that way before. Confidence is usually based off experience, in that you know something is within your ability or not., so I usually just keep grinding experience.
Although from experience I wouldn't say that confidence equates to speed, or even that it should.
Speed on its own is often sought after, but it's not the ultimate skill, like you could be really fast but make lots of mistakes, or carefully paced and do it right first time. I vary wildly between the two XD
Projection, if you're using the word how I do (that is, "imagining the end result, and then trying to create it"), is a very good skill which helps reduce mistakes or changes in direction because you're focusing on the bigger picture. It's something I'm continually working on especially when it comes to high quality levels of art.