My page view stats way off compared to AdSense -

[webpro00801]

Hi - I know this has been discussed before but does anyone have the short answer on this topic? I am just realizing that the discrepancy between what Urchin is telling me and what AdSense is showing for page views is nearly in half (I average about 60k page views a month this time of year - all with AdSense code, but Google is showing about 30k a day). I haven't seen a PSA or blank spot in ages, and I am on the site all the time, working, etc. Can this high of a percentage difference be attributable to people having javascript disabled? Or could there be a lot of people who come to my site that are not seeing ads, due to geo-targeting or other reasons? Or are those things just a small part of many other factors?
Thanks -

[incrediBILL]

PSAs are counted in total impressions by AdSense. The other 30K pages would be web crawlers and visitors with ad blockers or javascript turned off.

[OptiRex]

iBill's spot on with this.

The other 30K pages would be web crawlers and visitors with ad blockers or javascript turned off.

Ever since 05/05/05 I've battered my head against the wall trying to make sense of Adsense stats vis-a-vis my own stats.

I have 100+ sites and some of the less frequented show 70% plus crawlers/bots/whatever whereas the busy sites indicate maybe 10~15%.

The recent update has made Adsense stats much more in-line with my own favoured stats which makes me believe they have possibly resolved the problem that some of us have had since 5th May.

Whichever stats program you use will differ to any other program however I'm pretty happy with the Adsense stats now which, if you read my history of posts, should make you fairly confident they are reasonably correct.

[wyweb]

...other 30K pages would be web crawlers...

and probably are.. you can use robots.txt to slow them down, or even nix them completely if you like....

[webpro00801]

Thanks for the answers - it does seem that the MSN bot is running ragged through my site, I just didn't think it could be that out of control. My robots.txt is blank - I was already afraid of someone not finding me or making a mistake and shutting someone out. Does anyone have any specific advice of how to slow down the MSN crawler without causing them to not properly index your site?