From my point of view, and a few others share this unique study research. But, people that grow up with Deviantart, or go under the term "Deviant artists" seem to be at war with people that grow up with Newgrounds, that go under the term "Newgrounders".
It could be the other way around, seeing how Newgrounders tend to be filled with a lot o' hate. Then again, the main population of Deviantart tend to be the type that spends all day texting friends about their new picture that took a few shades of color, mixed with a cat t- Nevermind, that's just my Newgrounder-genes coming out.
I want to know what you think, from what I've seen the art content seems to be a bit like this...
DEVIANT ARTISTS: Smug, social-types. Advertises whatever they have the fastest they can, with whatever means they can possibly latch onto. Craves attention.
NEWGROUNDERS: Trolls, normally anti-social. Releases a few selected places, maybe makes a note of it publicly. Barely cares about general attention.
Now for the site directly...
DEVIANTART: I find the layout very confusing, the '~' makes me wonder sometimes about what is going on. Seem like a complicated version of facebook for the most part, possibly myspace, WHATEVER.
NEWGROUNDS: The tabs help a ton, seems very well organized. The colors aren't dynamic, but aren't forgettable.
So there you go, I might be bias on this study. But I often have deviant artists agree that some of the other artists are much to smug for their own good, and give the site a bad reputation. Likewise with Newgrounds, given the trolls that draw man-parts all day, and posting horrid reviews on other man-parts.
GIVE FEEDBACK ON THIS TOPIC, I CRAVE ATTENTION FOR IT.