Complete bullshit. The guy never throws a punch at her head with deadly intentions. It's a man's natural inclination to not punch a woman in the face, which is what you're seeing on display here. However, in a sporting competition such as this, I say the guy had every right to knock her ass out.
This guy also never used his strength to his advantage. Her being a "light in the ass" female would easily allow a couple of power slams from her guard that would, if not render her unconscious, would weaken her for a TKO.
I admire the girl's toughness, and she'd beat most men in a BJJ match on points if not an outright submission. But in my opinion, this was lame.