Adsense and server stats discrepency

[domainsdev]

Perhaps someone could explain this to me:

I have a site that gets 500-1000 daily page impressions according to server stats. But Adsense impressions read about 100% less. For example yesterday the site received 700 page impressions from 399 unique visits. But Adsense only shows 9 impressions. Yet the adsense code is on every page.

[europeforvisitors]

[webmasterworld.com...]

[leadegroot]

Bots.
You may be getting massive bot traffic and not many real visitors.
Do your server logs show all these visitors are pulling the images and js includes?
If not they may well be automated. :(