No, it's not crazy at all. You can train a child either way. You can either train them that you're not serious until you get to the "3" when counting, or you can teach them that you expect them to obey immediately. Kids are super smart. How many kids will totally ignore their parents until the mom raises her voice, starts to walk toward them, or starts counting, and then all the sudden they do what you asked? They have been trained to not take the parent seriously until this point (and believe me, children know what that point is with their parents). That's because they have been allowed to ignore the parent the first time, or second time, or whatever.
Picture the scenerio. Mom has said, "Bobby, it's time to put your shoes on now so we can leave." Bobby ignores mom and continues what he's doing. "Bobby, I said go get your shoes on for mommy." Again, ignored. "Bobby, I'm counting to 3 and you better go get your shoes on." Bobby ignores mom until... "Mommy's counting... one, two... two and a half....three!" Bobby finally obeys.
I am trying to learn more about GD but I need a 'how-to' guide for my spirited 3 YO.