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I dunno jackhammer, I got talking to a couple of friends and they both said they didnt think the above links you had were what they considered dubstep.
The below is what i consider dubstep:
PAHAHAHAHAHAHAHA. *sigh*
sorry mate but dubstep was invented in Croydon, London.
The sound has branched out into many different interpretations since it's inception (the Bristol scene being a prevalent cerebral trendsetter), and that includes your crass Americanizations unfortunately. (Not that North America doesn't have it's good producers)