He may be a great chef but he doesn't know poop about knife sharpening
On a few shows he showed people how to sharpen a knife with a steel rod. That is not sharpening, it is know as steeling the blade. It is done to dress up the blade and refresh the edge but the knife needs to be sharpened with an oil stone, or a wet stone (water) before it can be steeled. It is anoying to see someone that calls himself an expert but doesn't know how to sharpen a knife.
Here is a site that explains it
http://www.himalayan-imports.com/faq/Sharp.htm