Dog Head Size Predicts Strength, Speed

Dog Head Size Predicts Strength, Speed
http://news.discovery.com/animals/dog-head-size-strength-speed-110131.html

whats your take on this?

ya... I don't believe that... and our breed is a perfect example to contridict that story... I've seen dogs with pin heads and basketball sized heads that neither could run... I think it had more to do with the structure, but body structure not head structre.... IMO.

I think there is quite a bit of truth to the article. It's true generally speaking that the narrow built animals are faster. I can also get with the slender head theory simply because only a train wreck would have a head polar opposite of it body type.
Of course there are exceptions to every rule....but GSDs, Mals, BC's etc and sight hounds all have some similarities head type and body structure. All were designed by man for speed and maneuverability suitably for the specific job they were created for. Bull breeds while not slow were design to catch, control and dispatch animals much much larger then itself. So a whole different body structure and muscle overlay is manditory, which is one of the reasons they dominate in the weight pull arena.