I do good with banner if i have alot of other things on a site. People notice image ad if in middle of page better than text link with alot of text links above and below
banner do not perform well for me. I use primarily products links.... for the content as much as anything
Text ads usually perform better. People are becoming more and more internet savy and have trained their eyes to ignore anything that looks like an advertisement which includes banner ads. When ever possible I take to make my links look like part of the site, and when not possible I put up a banner ad and pray.