I guess I give it to Subban, though I haven't watched enough full Montreal games to know what his defense is like. Then again, NOBODY has actually watched enough hockey to vote authoritatively on all the candidates. The Norris isn't supposed to be the "reverse Selke trophy". It tends to go the defenseman with the best offensive numbers, so long as they are considered passable on defense, which is just backwards in my opinion.
A lot of Minnesota fans think that Suter is a front runner because of his defense and the minutes he plays. I guess I'm fine with him being a finalist, but it seems to be forgotten that he was downright TERRIBLE for about 15 games with the Wild. He looked completely out of place, and no goals until about halfway through the season, and wasn't even assisting much back when the Parise-Koivu-Heatley line was actually starting off on fire. If his first half had been like his second half, I could see it, but Subban came back from that contract dispute and was awesome from Day 1.