Blogs And Banner Ads?

I was curious to find out from those of you running blogs, are you noticing a lower amount of clicks on your banner ads but more on text ads when compared to other types of adult websites?

The past few months stats are telling me that banner and button ads are not getting as many clicks as text links are, so im actually considering dropping banner and button ads altogether from my blog network because of this to save on some bandwidth costs and replacing them with larger text based ads instead.

Has anyone else noticed lower than standard click thrus on blogs when it comes to graphic ads over text based ones?

Regards,

Lee