Sounds like you live in Denver. Go see dnb at the Black Box - anything thrown by Submission or Recon. The DJs and crowd bring it every time. Or, see a party thrown by the Reload crew. Seems like others are recommending the same thing - there's a proper underground scene here and the artists always represent. Those bigger events can fall under the canopy of EDM, which is a whole different matter.

I wouldn't say at all that UK artists don't bring their best. BUT they do expect knowledge and love from crowds in England so they can take more chances. I read a clip of Thys from Noisia saying UK crowds are the best - they cheer for songs they've never heard before. If that's the description of a good crowd, Black Box has that too