I disagree with this update.
This scenario is synonymous with the difference between ServerFault and Stackoverflow. Both have to do with solving problems with computers. However they reflect two distinct even if slightly overlapping disciplines.
Nutrition and Fitness are two related but separate fields with their own experts. There may be some overlap between these groups of experts, but in my experience the expertise is mostly separate. On the one hand there's dietitians and nutrition experts. On the other hands there's physical trainers--the folks I'd expect to meet at the gym. Most importantly, if I asked my dietitian to recommended an exercise regiment, she'd tell me to consult with a physical trainer. In the same way that if someone asked me, a programmer, what kind of server should we build to run the production code I wrote I'd tell them we should consult a systems admin
As Ivo says in one of the other discussion threads
Wouldn't it only be the physical
exercise part of weight loss? And
sport nutrition, but surely not: what
should I feed my 2 month old baby?
A true Nutrition only site might cover the latter, but as for this site strays greatly from the original definition. I don't see anything in the new definition that limits the discussion to the physical fitness side of nutrition.
It would make a lot more sense to have a site called "physical fitness" with diet related questions related to working out on topic and keep the opportunity for a Nutrition only site to rise up on its own.