I don't see the relevance of the style guide mentioned for the debate over how to teach beginners. When you check out a guide, it has to be assumed you are familiar with pretty much most of the syntax of your language.
Oh, no concern at all about the ruby style guide. I even point people at it in the book so they can start grasping and writing code with other people. My mention of the guide is not intended as a knock on the guide at all.