This is indeed important an important finding. Unfortunately, the comments and interpretation are based on antiquated notions of nutrition and obesity. Yes, you could probably design a diet around these microbes that resulted in obesity, but you could also create one that resulted in vibrancy. Additionally, these microbes seem to be ubiquitous, the balance being the result of diet. Introducing them is not the solution; observing their changes in response to dietary changes is where the clinical value would lie.