Yeah, I notice my ability to judge someone's unhealthy weight has been destroyed, too.  Someone's "normal" if they're overweight, "chubby" if they're obese, "big" if they're morbidly obese, and "huge" if they're 600+.  I noticed this when a group of "kinda big" coworkers were talking about their doctors insulting them by diagnosing them with morbid obesity.