Disparity between Urchin and Adsense

[mike schmitz]

While I imagined that a small descrepancy would exist in my pageview reporting tool (Urchin) and Adsense, it appears that my pageview to Adsense impression ration is 100:35. I have Adsese on every page that gets more than a couple of pageviews. The difference is large - I report almost a 100k more pageviews that Adsense ad impressions. What gives?

M

[frox]

Hmm...
I am trying AsRep, and I find there a difference in impressions of abt. 30%
OTOH, I see about 60% clicks more in Adsense that in AsRep. I must try one of the other methods of tracking clicks that AsRep offfers.

[jomaxx]

Possibly due to spidering, depending on how your reports work. Spiders can generate quite a lot of page views.