I've never heard the term before, but I think this is what my DS7 and I are, and probably my DH, too. We all find an "obsession" and really dig into it. When we've exhausted our interest in that topic, we move on to something else.

I don't know if it's a common learning style or not, but I would say there are at least 2--and maybe 3--more of us in the world besides your son! smile

Kriston