Didn't Cain throw something like 220+ punches against Kongo, yet never knocked him out and Kongo isn't exactly the toughest kid on the block. No doubt that when Cain clocked Big Nog, Big Nog looked like he'd been hit with a truck, but I don't know about that Sport Science shenanigan, cause again, Cain's fights certainly don't reflect this kind of alleged devastation.
His TKO wins consist of Ben Rothwell, Denis Stojnic, Jake O'Brien, Brad Morris, Jeremiah Constant, Jesse Fujarczyk and a UD against Cheick. Most of those people his would be hand grenades couldn't KO are relatively nobodies and unheard of even to a respectabally savvy MMA fan.
He KO'd the shet out of Big Nog, but Big Nog made Frank Mir look like Floyd Mayweather when they fought, and lets recall Mir's last fight with Mirco, he was certainly no Floyd Mayweather to even a dead fish out of water like the Mirco of today.