How long did it take you to realise Google paid money to have adsense on your site from its inception date? I know some people had no idea about adsense for up to 2/3 years despite being interested in webmastering and being a frequent surfer.
My story is even more pathetic. I was accepted into AdSense near the beginning of the program. After a lengthy period of inactivity, Google phoned me and asked if I needed help getting going. After another five or six months, I finally got going. Total delay -- 12 to 18 months.
i heard from my friend " i was like what is adsense" and then i read across the faq to understand it properly.
I got Adsense account in June 2004 and after almost 2 years, I am actually looking into it. After reading articles and forum and blog posts that how people are making big money with Google Adsense. Well I got to know about Adsense while learning SEO tips.
I think a lot more people will know about adsense sooner now that asdense referral banners are pasted on so many sites, encouraging people to sign and start earning money from their sites.