Colorado sells out frequently when they dont suck ass... They did well until the last 2 years if i'm not mistaken...
Phoenix, it doesnt matter who their playing, theres more fans of the away support. I've been there for sharks games where it sold out, or nearly sold out with JUST sharks fans... Much less, whenever Montreal or Toronto steps into that building, the place is littered with their fanbases just as much as Detroit's, if not way more.
An even better example is what happens in Florida when Toronto/MTL roll in. I was watching a game earlier this season that was Toronto v. Tampa bay, and for an entire period, I kid you not, I thought that Toronto was the home team, and was wearing white tops like the old days... I didnt even really pay attention to the logo at centre ice, there were just so many louder TO fans there that I didnt even realize it.
So yeah, I wouldnt say Detroit travels the best NOR has a larger fanbase even in the states..