I would go so far as to call it explicitly disheartening. To put those figures in perspective, someone at the lower BMI threshold (30) for obesity needs to lose

I would go so far as to call it explicitly disheartening. To put those figures in perspective, someone at the lower BMI threshold (30) for obesity needs to lose 1/6th (~16.7%) of their body weight to get down to the upper BMI threshold (25) for healthy weight; he's bragging that 50% of patients in the "intensive group" can maintain 5% weight loss, and 27% can maintain 10% weight loss. I'm sure that's enough to effect some improvement in health outcomes and quality of life, but I can't imagine it would be helpful to hear this data if I was obese. And that's just comparing to the lowest possible weight at which someone can be obese -- for people who weigh 300+ or even 400+ pounds it would be laughable to hear a doctor say that committing to permanent "intensive" lifestyle changes would likely result in no more than 5% permanent weight loss. Why even bother?