I think you hit a pretty good mark with your post OP.
I think it's a combination of a few things really. There really are a lot of people who are just getting into the electronic dance music thing now. With this current wave, which we can thank Dubstep for, there's a lot of new people who just do not know the history or foundation of where everything came from. It's the issue with new folks in anything, but it's just a matter of teaching people.
I see it with my friends. Now, take I've been listening HARD to this stuff since I was about 14 or so, going to shows since I was 16, and that was 11 years ago. I'm only NOW being able to get them to come to some shows.
Of course people are going to go nuts at Ultra for the stuff they are familiar with. It just happens to be the "big" thing right now, the boys touring the most, happen to be Dubstep guys.
It also people love to bitch about success. Someone is famous? He MUST BE A DOUCHECANOE! >.> But seriously, it's just one of those things. People do it with every genre of music, as most of us live, eat, sleep, shit EDM, we're just seeing it here more and more as our love becomes popular.
Haters gunna hate.
And I agree with you. Just take it all in. I'm fucking HAPPY that more "pop" artists are playing housey business. Seriously. If this shit was on the radio, I would STILL be rocking out to it. And current pop music? House music of 5 years ago with shitty lyrics over the top.
It's also a matter, and this is just my opinion, that there are two kinds of people who listen to music.
1) People who listen for lyrics.
2) People who listen for the beat/melody/rhythm.
And that defines our musical culture. The lyric folk own the "overworld" (as I like to call it), and the music folk have always owned the "underground" really. Just look at opera vs symphony, blues and jazz, the list goes on.
More people are realizing that what we listen to is awesome. And instead of laughing at them for liking some of the break-through artists, I like to say "Well if you like those guys, check these guys out." And help learn people up a lesson. It's another part of the electronic music community as a whole that I really enjoy, more people are nice and willing to help out rather than just be dickbag-shitfucks about everything (Can really see the difference from punk vs edm on this issue, even if there is a shared comradery).
Don't get too worked up about anything. Enjoy what you enjoy, do what you do, and if it gets popular, enjoy sharing that with more people.

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), so dramatically, but yet the way some ppl think about it is so standardized. 
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