Firstly, people are forgetting that JWH had loading AND carryover points so his suspension was always going to be disproportionately high. Also, jumping at a player and belting him across the face is always going to attract a higher grading.
Having said that, there is absolutely no consistency and there have been plenty of other tackles that deserved higher gradings than what they got (or recieved no charge, such as the Gallen tackle). Steve Matai got a week for a high tackle on George Burgess that bounced up off the ball and barely glanced the chin. A couple of weeks later he recieved a tackle flush across the nose from Shillington that got put on report but recieved no charge. I have no problem with either of these decisions on their own but if there is going to be consistency they need to charge both or let both off. I don't buy into the NZ bias that many complain about but there is absolutely a different set of rules for origin players and it applies to both states despite the incessent whinging from Queenslanders about NSW controlling the judiciary.