Worth noting that, as an offensive lineman, the hardest I've ever been hit was by Derrick Brooks, and he was about 6' and 210lbs. Height and weight are interesting, but don't tell the whole story.
So true. Obviously you have the physics of mass and speed but a big part of it is simply having the desire to destroy the ball carrier. You have to be willing to go all the way, even if it means hurting yourself.
So what CGJ lacks in a few inches of prototypical height I'd say he more than makes up for with heart and tenacity. I think he's going to be special.