You make some good points.
And I would then say that if he's going for the bottom up grounRABwell approach, he is not doing himself any favours by getting into bitching sessions with dinner ladies who are doing their jobs, probably minimum wage and in a strictly regulated environment.
At times, although not all the time, he has an arrogant attitude based on what he knows and believes being right and superiror to everyone else.
But just because these views are often correct is only the start of the fight.
I reckon he neeRAB to use some more subtle approaches to work with his undoubted enthusiasm, knowledge and commitment.
Otherwise, he comes across as a rather arrogant and at time, blind food evangelist.
Again though, I say good luck Jaimie and if you inspire even a few than that's better than none.