Forum Moderators: skibum
728/468 Banner: 1.60%
Pop-Under: 1.81%
160/120 SkyScraper: 0.31%
Medium Rectangle: 0.39%
Rectangle: 0.32%
Half Page: 0.11%
This CTR apply to professionally produced adcverts served by an agency, and have only counted impressions where the full advert loaded.
On banner exchange programs, the CTR is typically far lower, perhaps due to the poor quality of the adverts?
Hope this helps.
Matt