I think you missed my point.
This community is dominated by (though not completely composed of) conservative music lovers. A glance at the music threads over time will confirm that. The music of Jimmy Page is certainly far more beloved here than say, the music of his contemporary(ish) Phillip Glass. That speaks zero to their relative artistic merit as composers - particularly since Page stole as much material as he created (great guitarist, tho) and Glass continues to further the evolution of musical language (for better or worse). No surprise that I'd agree that rap would be unpopular in the vote you suggest - it ain't what people here want to hear.
OTOH, rap dominates music sales among young people. The inherent assumption in the audiophile vote you propose is that the musical taste here is "superior" to the masses. If you're talking about discriminating between two guitar heros of the '60's, I'd agree that the knowledge base here would be relevant. Once you extend the debate to more recent genres....
IOW, my observation is that it is (with several notable exceptions) popular music posters here are narrow, backward looking, and quite conservative in their musical taste and would likely reject rap in a heartbeat. It's also likely that the community is older, wealthier, whiter, etc. than the population in general. That might have something to do with the musical preferences here, ya think?
If I'm being honest, I'd include myself in that group. The difference is, I'm not dismissive of the entire genre.
Marty