gamiziuk - 9:22 pm on May 24, 2006 (gmt 0)

Difference in earnings between G and Y seems to depend on the topic of your web site.

I have a site about golf - G brought me some clicks, I changed some pages to Y and made more money.

Another site about travel/hotels - G brings more income than Y.

You just have to experiment until you find the right mix - which ad network works better on each site.