Only 2 ads in 300x250 on just published page

I thought they make it by statistic of each page

[jetteroheller]

I just published a new page.
I use sitemap.xml

Some hours later, I was shure on of the first visitors, but in the 300x250 ad block had been only 2 big ads.

So how does Google think, that this 2 ads perform better than 4 ads?

I thought they make this by click statistics of each individual page.

[Jolly_Roger]

I just experienced _almost_ the same thing. I changed my 250x250 square to a 300x250 rectangle and my ad count went from 3 to 2 on all pages affected. It looked terrible and didn't contribute anything to my test so I removed them, put the square back, and it immediately went back to 3 ads.

[jetteroheller]

On some pages, I have beside the AdLink 2 ad blocks

first 120x600 or 150x600 depending on space in the content area

300x250 in the navigation.

I noticed several times 4 or 5 good targeted ads in the content area, but only 1 ad in very big letters in the 300x250 and less targeted.

[ken_b]

I noticed several times ..... but only 1 ad in very big letters in the 300x250 and less targeted.

If what ou are seeing is not a PSA, it sounds like it is a site-targeted CPM ad.

[AdSenseAdvisor]

Hi there -

It sounds like you're seeing expanded text ads. When our technology determines that a larger ad will perform better in a particular space, the larger ad will automatically be shown.

If you'd like more information, please visit this AdSense Support entry:

[google.com...]

-ASA

[Jolly_Roger]

Hey, AA... I'm pretty sure the ones I saw were standard size, with large (ad-sized) gaps between them. I've seen the expanded ads in several formats so I'm pretty familiar with them.

[AdSenseAdvisor]

Jolly_roger - I think these are still probably expanded text ads. They come in a variety of 'looks'. Sometimes, you'll see 1 ad per ad unit, and sometimes you'll see 2 regular-sized text ads in a format that can hold up to 3 ads.