Funny that you brought up nutrition, why do you think that would matter for a scout.
Well I dont pretend to be any expert on what makes an effective talent evaluated but like you said in your original point I'm spending 40+ hours a week evaluating potential multi million dollar assets. Nutrition would come up after I've decided that this player might have a future in the league and the question then becomes how long of a future?
Part of the evaluation process would involve how likely they are hold up over the long term, I'd like to see injury history, I'd like to know what their strength and conditioning routine is, and I'd like to know what type of fuel they are putting in their body.
This ain't like the 80's, most of the top prospects have a training staffs maximising their potential, if I find out a talented player drinks monster all the time to wash down his cheeseburgers you better believe that will be factored in to my final evaluation.