Musical Musings… What Makes Dubstep Dubstep?

To be honest, I’ve went over the all-knowing Wikipedia, and though extensive, I still barely get what makes dubstep what it is.  It’s still techno to my limited understanding, just with a half-step drum pattern and wobbling bass lines?  I guess it does sound different enough, because unlike techno… I kinda like it.

This is an example of dubstep by Plastician called Japan:

Or it may be grime.

I don’t know.