For sure. It's not bad advice. It'll definitely keep you out of the triangle.
My instructions were simple, sure. I was in jiu jitsu for about three months before I figured out that rule, nobody told me, so I just figured someone reading this who understood my comment would have a little knowledge as how to pass the guard already. For my self when it comes to jiu jitsu Im a visual learner, its hard for me to write or read text and fully understand or explain it. Thats why I recomended the Nog/Fedor 1, I just thught if someone kept what I said in mind and watched it, it could help
I'm just saying, there are moments when passing the guard demands having one arm in and one out.