I didn't say anything like that. In fact, I'm arguing the same point: we can't say his folksy style had any effect on the bottom line, good or bad. I'm just saying that it's clearly not required for good management.
I'd say that's pretty dependent upon one's definition of "good management". Not running the company in the ground is merely acceptable. Looting the company and distancing yourself from the people that sustain your lofty position while not running the company in the ground still seems pretty crap to me compared to engaging your employees directly and keeping your consumption (read salary) in line with the rest of the company while not running said company in the ground. YMMV
