Well, it's not metal, and I don't mean that as in how I don't really consider Faith No More, Tool, Agalloch, Korn or System of a Down metal. You may like them if you like experimental noise, but even then it's probably a stretch.
Calling it simply experimental noise is a stretch in itself. There are lots of music out there that are experimental with a type of genre but they shouldn't all be in the same category. Maybe calling it experimental metal would make more sense. Music genre needs to evolve. Having everything the same is pointless and boring. Also yeah, how is Agalloch not metal?
Maybe aTelecine aren't noise (which is a genre that I admittedly have very little knowledge or interest in), but they sure as hell aren't any kind of metal. Maybe they're industrial, ambient or some kind of experimental rock (though nothing I've heard from them is rock). Not everything with loud distorted guitars is metal. None of the songs on their myspace are even close to metal either. You'd think that a metal band would display their metal tracks. Have you even heard their music? Because I have absolutely no idea why you'd think experimental metal is a more suitable tag, unless you think noise isn't an actual genre and I meant it as an insult.
I think Agalloch's case is pretty obvious. "How are they metal?" would be a better question. They have some definite metal moments, such as bits of "Wooden Doors". I'd say they're about 20-30% metal, though you like their music it shouldn't matter. So what if they aren't metal?