Tobias, You got me curious...I thought, how can she say she can certify you. I emailed her your comment and she responded that not only did she develop the method, but she's helped hundreds of people all over the world, including yourself and Jennifer, personally teaching you two her method in your bakery.
I would say of all the people out there claiming to be a pro at it, she would be the world champion of the method. Provo Craft developed the Cricut Cake machine after her presentation to them. She teaches the method which applies to ALL electronic cutters.
Certifying someone does imply a certain amount of authority, she developed the method, perfected it. Linda Mcclure, of all people, has the authority to teach others how to teach it.
Her "home videos" have been an invaluable source to so many people who are making great cakes, including yourself and your bakery, because of the effort she put into it.
Why are you being so hateful to someone who has done so much to bring a new cake decorating method to so many? She has done nothing but give and give and give and you seem to just want to tear her down.