https://www.google.com/adsense/static/en_US/AsktheBuilder.ht...
http://www.washingtonpost.com/wp-dyn/content/article/2006/07...
At 30K uniques per day you become a google premium adsense partner and google will allow you to customize the adsense code etc.
My experience matches up with what drp is saying: Once you start serving a high volume of AdSense ads, the CPM drops dramatically. The result is that you essentially receive a fixed income from Google based on your audience and clickthrough ratio.
In addition, the "Premium" program has not existed for several years. I have 60-90k uniques, but do not qualify for any special consideration (I've asked). The features of the old "Premium" program are now offered à-la-carte to publishers based on factors which are much more strict than before.
And the figures he gave are just examples set to scale. The numbers he quotes are irrelevant, because the amount of money one makes an an AdSense publisher varies greatly depending on many, many factors. Just because "ask the builder" makes $1,500/day from AdSense doesn't mean that most publishers with the same traffic will.
See this comment http://news.ycombinator.com/item?id=712746 200K impressions, 1300$ income
The only knowledge you gain from idlewords' comment is the final amount. For all we know, $1,200 of that $1,300 might be earned from the first 100k impressions, and the other $100 from the second 100k.
In addition, just because idlewords has earned $1300 from 200k impressions doesn't mean that he won't soon exhaust his inventory if his site grows.
2. At that traffic level, you will become a google adsense premium publisher and google will help in optimizing your ads to generate maximum revenue
3. It just doesn't make sense that google can't fill an inventory. Unless you have a highly limited site with very less keywords to target, there will be plenty of inventory. At that traffic level, you can privately place ads if you are not happy with google. Do you think google would let go of a high traffic site? No! and this is precisely why they have a adsense premium publisher program