I just discovered VG24/7 yesterday, and I'm surprised at the quality of the comments here.
For the most part, they're actually on-topic, relevant, and thoughtful. There's a decided lack of nonsense, (trolls, ads, fanboys, flame wars, obscure references & poor attempts at humor, etc, etc). Very refreshing.
The majority of users write in full sentences that contain real English words. They use punctuation and spaces. This blows my mind.
I don't know how they've done it, but VG24/7 has achieved something rare not only for a video game site, but for the internet in general—worthwhile comments.