Well, that would be useful, but you immediately have a problem. I don’t think many of the followers have ever really noticed that Jesus doesn’t show up, so they’re burdened with the same bad assumption we make. If you ask the people who have noticed and seem to be leaders they’re not going to tell you they’re not following Jesus.
It’s like asking someone if they’re heretics, most people don’t know, and the ones who do won’t tell you they are.