I am like this in class too, not as eggstreme as the OP, but on this same spectrum. I also can't process what people are saying to me after a few minutes, so I don't learn well this way, from people. I don't learn well from people teaching me in general. I learn much bester on my own, from things that I read or figure out or make. I don't have ADHD, because I don't have trouble focusing on what I want or need to focus on, regardless of the task or how much I like or dislike it. I have good control of my focus, and I have good executive function, as long as I don't have to process people and what they are saying or doing around me. When I am around people, I appear to have problems focusing. I act like I have ADHD around people. I look like I am not paying attention at all, even though I may be paying attention or trying to pay attention. I usually pay attention for the first five or ten minutes of a class or a meeting or a social event. Then, I stop processing, so I stop paying attention too. After that, I get nothing out of it, and it is bester for me not to waste moar time there. Maybe my problem focusing around people is sensory overload from the people and the environment. Sensory overload drops my cognitive functioning, including my executive functioning. I think bestest alone.