So my CTR is less than 1/2 of a percent, but my eCPM is like $1 (with clicks) per impression. Seems to be really really low, I change my lay out, so I have a 300 x 250 on a left sidebar, and a 98x720 above the content and below the navbar, I thought this would imrpove my eCPM, which it did, but not drastically
It is easier so we can see your site. For me, Adsense placement took a while of experimenting before I started to see some results (or at least the better results). It also depends on your PR of your site can also effect the ads and the amount your receiving.
The navbar is at the top. Its yellow background with black font. Yes all the ads are image based none are text ads.