It is utter bull s**t.Just had a quick look and Gray was suspended for a week for careless, medium impact when he knocked out McGovern with the following hit.
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Plus, Natanui got a week for careless, medium impact to head for his tackle that concussed Amon. While there does seem to be a provision to upgrade a charge from low to medium impact if there was potential for serious injury, I’ve got a feeling that Tex might be the first to get done for medium impact to the head where there wasn’t a concussion to the opposition player...
Tuohy got "dazed", and it wasn't necessarily from the Tex bump, but also contributed by a whiplash effect, and causing his head to jolt from the impact on the ground. You can argue that everything happened from the bump from Tex. However the intent to knock his head was not there, as mostly you can see it was a body bump.
Then, it's only a matter of how serious the head knock/injury was. Tuohy was more "stunned" than a concussion, because you can see he was jogging off the ground fine without any signs of unsteadiness. A typical concussion, the brain is literally dysfunctional and speech, gait or running patterns would look abnormal. Tuohy did not show any signs of this when he jogged off and when he came back, played better than half of his team mates!
I honestly think it's "low impact", but because the media/commentators had made a big fuss over it during the game, it appeared more serious than what it really was.
Another way of looking at it is comparisons:
Tex bump on Tuohy versus Stewart defensive punch knocking out Greenwood. The level of impact was roughly the same. And Stewart wasn't even cited for rough conduct (and rightly so). These sorts of impact you see commonly in every freakin game!