Mmm, I dunno. I'd like to watch some of his teams to see if we can really ascertain what it is he's talking about. See the quote from him I'm focusing on below...
Who in the NHL is coaching the way Gronborg spelled it out?
“We involve all five players in the defense as well as the offense,” he said. “The game is not as static anymore. Everyone needs to go outside the box a little bit. Forwards are not always forwards, and defensemen are not always defensemen. It’s the situation that steers that and dictates it. That’s how you raise the pace of the game.”
I don't see how you can have a static system and accomplish what he's talking about here. I think he's talking about more than offensive D men jumping up into the play. I think he's talking about taking that concept a step further. Yes, we do see some five-men unit plays on entries from time to time, especially on the PP, but we're not seeing a sustained approach using this concept.
Add to that allowing the players freedom to create on the ice instead of playing a manner outside of their personal style, I do think this guy is taking a fresh look at the game and we haven't seen it here unless you watch pee-wee games.