Neilson Website Ratings of top News Sources

What is the deal with the Nielson Rated websites?
I am curious where I can find the latest Nielson Ratings for Websites. I heard reported on a local radio station ("right" biased station) that the Drudge Report was the top rated News source on the Internet beating out the Daily Kos and the Huffington Post and CNN and Fox. Those were in the top 10 yet they mentioned Fox Digital Networks not the Fox News website. Does anybody know where I can find these ratings? I am just baffled and saddened by the report and am questioning the validity of the list.
By the way, McClatchy was not on the list.
Does Nielson really officially rate websites now?
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