I would be curious to now if your bounce rate is very high and maybe most of your visitors are clicking right back out before even scanning the entry page, therefor not even having the chance to see the adsense options. I also agree as above think you need to check if your visits are targeted.
You may blend the ads color with your site. Also find the potential position for ads in the web page. You should get help from Adsense help center. For this search for "Where should I place Google ads on my pages?" in Google search engine.
I can't believe there are people that don't believe you can make hundreds and thousands a day. Humans amaze me!
Thats wrong, there are many people who make $500+ per day with adsense, especially who are running huge network of websites or autoblogs....
No it doesn't seems normal to me at all. I would be earning a lot more with that amount of traffic, you should consider some alternative monetization methods.