From what little I've seen of CM (as demonstrated by rodney king), I think it's really, really effective against certain types of opponents in certain scenarios.
I don't think what Pulver was doing was "bad" CM; I think it was shielding (using one arm to cover, one arm to counter). From what little I've seen of CM, it uses both arms to shield, head movement to create better defensive angles, and a concave torso to guard (or discourage) against kicks to the body. Based on this, I wouldn't call what Pulver did as CM.
but, again, I defer to the experts.