U.S. Map of Baseball Teams by Zipcode. (By using Facebook data)

[Linus Van Pelt]

It's possible that people are "liking" teams on Facebook that they're rooting for in the playoffs even when it's not really their team. I don't think the majority of hockey fans in Toronto are really non-Leafs fans, and some of the others seem low too.

[Linus Van Pelt]

I realize this is probably laughable ignorance on my part, but please remember that I'm a Southerner and thus have no exposure to the NHL ... the Habs are the Canadiens, I assume? Is that some kind of French pun or something?

Yes.

It is short for "Habitants", which is a French name for early settlers in colonial Quebec. But how it got applied to the hockey team, actually, I don't know.

MaxQue or RogueBeaver can confirm this, but I think that it's actually mainly used in English, even though it's from a French word.