Friday's the day we use for the stranger and more oddball stories in our lineup, and one of the more unusual we've seen in a while comes from Harvard University.

It's an article—actually a handful of articles—covering research by a scholar of "disruption" who argues that Silicon Valley startup carmaker Tesla Motors isn't disruptive.

Instead, he suggests, the truly impactful electric cars will be tiny, low-speed urban vehicles.

The Tesla Model S is only an "incremental" improvement on what's already out there, he says.

Written by Thomas Bartman, a Harvard Business School think tank studying disruptive innovation, the story appeared two weeks ago in the usually august Harvard Business Review (via Gizmodo).