Not to me as they suck so their for don't mean canon for me.
Good thing what you think doesnt matter to Bioware in this case. Seeing as writers in their employ or those chosen to work with the franchise in other mediums with oversight pretty much do pretty much make canon material.
You shouldn't need to go outside the game to figure out what's going on in a game.
I shouldn't have to go to a comic book, twitter, or doodles on a napkin in order to "get" the game.
If it's not in the game, it doesn't matter.
While I do agree to an extent, this annoyed the hell out of me in Gears of War 3 and could have done the same with Halo 4's Spartan Ops mode, I do not see a problem with expanding a franchise into being a multimedia experience. If its to be referenced in the primary medium, at least make it be more of a nod that the devoted fans will enjoy and NOT a plot relevant point that escapes notice because it came out of another medium.