Did a gig over the weekend. We played "Guess which one was an MP3".
I was right 100% of the time. And this was in a LIVE situation. His source, so he knew what he was spinning.
Let me say this though:
Scratching. He does do scratching. Now that I'm really paying attention, scratching via actual vinyl sounds MUCH better than digital. Digital isn't bad, but given the choice, I'd rathe the DJ scratch vinyl.
I love new stuff, I love old stuff. Sometimes, the old stuff just works out better.