Although I don't know what the article says, I've used Mars and thinning shears on my retired show dogs for years. In fact, I was able to get an old retired black dog of mine back to show coat by stripping him out with the Mars and by hand after he'd been clipped down, or as I call it, 'beaglized', for years. It took a while to grow out his coat though!
I love the using the Mars, so don't worry about it. Ultimately, it's what you want your dog to look like that counts.