I've recently dropped adsense ads from my forums and run them only on the website itself (They used to be on both). I also changed the ad to a leaderboard and made the colours almost the exact same scheme as the rest of my page.
Now my CTR has gone through the roof - last month an average of <snip>, this month it's been <snip> today. I'm scared, should I be?
[edited by: Jenstar at 11:02 pm (utc) on Mar. 4, 2004] [edit reason] edited at KakenBetaal's request [/edit]
I wouldn't worry. AdSense typically performs poorly on forums and leaderboards tend to perform better than banners (which is what I assume you used before). Your current CTR is not what I'd consider high, though there's no universal high/low CTR. Considering my experience with fraud detection systems and the likelihood Google's is much more advanced than anything I've touched I wouldn't be concerned. I doubt it would happen, but even if the increased CTR flagged your site for review unless there's actually something fraudulent taking place I wouldn't expect that they'd contact you.
I'm with richmondsteve. Even a sudden jump in impressions doesn't panic Google :-) . There have been sites that got mentioned on big news sites and suddenly saw their traffic jump 100 fold but without running into any Adsense problems.
I wouldn't worry. You aren't supposed to disclose CTR figures but those figures are well within what some content sites get on a regular basis. Whether it's on par for your industry and your type of content/layout etc I wouldn't be able to tell you.
I think that's whats behind it too, but that much of an increase in CTR is waaaay more than I thought possible or even reasonable. Thanks anyway, it's good to hear that it's not as far out of the realms of possibility as I thought.