No, it's not. Because if you're used to reading igo code and then you're browsing normal Go code in GitHub or watching a talk or reading a tutorial, you're going to have to mentally translate that code to igo. It's needless mental acrobatics.
Most presentations don't use pure go-fmt'd code, they usually do some vertical space compression to get the code to fit on the slides better. So technically you already have to do this anyways.