Does Google's Adsense pays 78% to everyone?

Google's AdSense reportedly pays publishers a good slug of revenue. Do small fry get the same deal?
Stephen Baker

The New York Times reports that Google's AdSense pays Web publishers 78.5 cents on the dollar. (Thanks Problogger). My question: Do all publishers get the same rate? I've been told that big publishers get rates like that, while small fry get one quarter as much. Anyone know?

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