Pigs still don't fly, but they might as well, because Google finally decided to open up about their AdSense revenue share (read: the percentage of money they take in that they split with AdSense publishers). The official blog article discloses that AdSense for content publishers earn a 68% revenue share worldwide, which is far above what most other networks offer (typically they hover around 50-55%). They also mentioned in the article that within the next few months, they will begin displaying revenue shares right within the AdSense interface.
This actually marks a really big step for Google because it means that they realize that they aren't so "high and mighty" that they don't have to play by the rules. Finally, Google is learning that if they don't step up their game and offer at least what other ad networks do, they won't be #1 forever.