robho - 6:16 pm on Aug 24, 2003 (gmt 0)

It's really too soon to tell. I went from skyscraper on some pages and 468x60 banners on others to all leaderboards, on thursday.

Comparing with the same three days (thu, fri, sat) the previous week, CTR is up about 25%. But, CPC is down 18% or so (perhaps more lower-paying ads shown in the 4 ads?), so the effective CPM (which is what really counts to me) is up less than 10%.

However today sunday both the CTR and CPC are way down so far, so I can't make any conclusions yet. I'll give it at least a week.

From the design point of view my preference is for resizing skyscrapers, but now that they are no longer available the leaderboards are not too bad. However they do have smaller text than the banners, which might reduce their effectiveness.