The only facts contained in the article are percentages of tooth erosion and gum disease in professional athletes. They don't say anything about what kind of diet these athletes ate, just that many of them drank a lot of sugary performance drinks to help recover from training. It is probably true that most athletes do have a somewhat high-carb diet because that is what allows them to be top-performance athletes. I would be willing to examine the facts of this study, for example the percentages of athletes with dental problems compared to the general population, that would give us a little more information. These studies were about athletes in general, not just those that ate high-carb, there could have also been paleo athletes included in this study because it was all professional athletes, regardless of diet. I'd have to see the actual studies.