So it turns out that I am not crazy. We ran into another biker going the opposite direction on the Northern Tier and had dinner with him. During dinner, we mostly both had our maps out - us telling him what good stuff was coming up for him and he telling us what was good on our route forward (very convenient, this information exchange). But during dinner, when I ordered my usual chocolate milk, he noted that he had heard from other people that it was a great energy drink. Thus, outside conformation.
Also, Jason has switched over and will now do chocolate milk or shakes with me.