I've always found the crowd reaction to Nuxx to be interesting. Most people seem to recognize only the main chords and the lyrics. Even at a solo Underworld gig this is very prevalent. Most of us on the forum will recognize it right away; the kick, the percussion, we'll know it less than a second from when it starts.
The majority of the crowd wont. They'll stand there bobbing their heads because they don't really know the track, and they don't know what's coming. Then when it hits, they're overjoyed.
*shrug*
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Soichiro Honda