I haven't heard of it, but I'd be suspicious. I used to potty train kids in the Spec Prek program at our school. Kids pretty much train when they are ready. I don't mean that you shouldn't try, I just mean patience is key to success. You simply can't rush it. Different kids need the steps taught to them for different intervals of time, and you never know what that will be for which kid. Having said that, it doesn't hurt to try it as long as it doesn't make your little one anxious or upset. Good luck!