The technique is outside hands, hands on shoulder pads rather than a punch inside and a grab of jersey. Bob undersells this a bit, but the Packers are not the only team using it. Best part is this:

“The whole game they were on top of our shoulders,” said [Michael] Bennett, a two-time Pro Bowl selection [for Seattle]. “You can’t do anything. You can’t get off. How could I possibly get off when he (left tackle David Bakhtiari) is holding the back of my pads? Try to spin when he’s doing that.
Which makes me so happy I am dizzy.