Can any American explain to me..

[Krutch]

...what they mean when they say "They sound very Canadian" when referring to a band?

I sometimes recommend a couple bands to friends across the border (Thousand Foot Krutch, Dream Jefferson, etc) and alot of them say they sound very Canadian but whenever I ask them to explain they cant seem to put it into words.

Anyone want to help clarify? What exactly does that mean because I hear no difference between American and Canadian music.