LukeW's UX-role taxonomy (or 'Product Leads and Strategic Designers')

Luke Wroblewski has some interesting thoughts about two orthogonal roles in the user-experience design process: Product Leads & Strategic Designers.

I’m not sure whether I’d classify myself as one or the other, though. As director of strategy here at Extractable I’m clearly a strategic designer in this scheme, but I think I’d be equally interested in seeing a specific (software application) product through its entire lifecycle.

I wonder if there is actually a temperament or skill-based distinction here?