The root aesthetics of what we now know as 'dubstep' have been around since the 80's at least though.
Drums, bass, space, effects, 140ish bpm
Modern synthesis is really the only thing that gives dubstep any separation from dub, for me it has just come full circle, just the advancement of production techniques has opened up more opportunities within that realm. To say that dubstep is an 'invention' sort of implies that the ideas are more pioneering than they really are. It's more of a mutation, or a re-appropriation of existing ideas in the grand scheme of things.
Think I've made a slight hash of explaining what I'm getting at but do you see what I mean?
Sorry for fully derailing the thread n all