Whew, that's a whopper of a question...
I don't think it's worth ranking them all...but I'll say this...
1. Chicago - They're fast, very mobile defense and they play a fast game.
The Islanders and Canadiens are fast too...the Habs don't always play a fast-paced game, but they do have some speed and quick strike ability. The Ducks play a fast game and their depth is fast. Their best players aren't the speediest (Getzlaf, Perry, Ryan, Beauchemin) but they fit fine in the system. They might have the fastest depth in the league. Vancouver is faster than their best players would represent.
In terms of slowness (in no real order):
The Rangers are pretty slow and play a slow game. Hagelin is fast, but he's just a depth forward. So is Kreider.
Toronto has some speed at forward (Kessel, Kadri) but they have one of the least mobile defenses in the NHL which is greatly inhibited when they scratch both of John-Michael Liles and Jake Gardiner from their lineup.
Boston is pretty slow throughout their lineup and play a slow game. Their defense isn't very mobile either.
San Jose started out slower, but after moving Douglas Murray and Ryane Clowe, they sped up a little. They're still a board-working team that uses size a lot. Not really a free-flowing attack team.