those big text ads

Ive seen single ads fill up the entire banner and leaderboard size ads. These ads have larger text etc than a standard ad, but on my sites all I see are perhaps a single ad in a leaderboard but with the normal sized text etc.

Are these big ads paying more to earn that larger text?

Do I need to do something to enable these larger text ads, or are my advertisers just not spending the big dough?

 

ahh ok, yeah I feel like I've only seen them on established websites...

 

Oh, that makes sense. No wonder I keep getting the same ads! *duh*

 

They may also be the optimized ad unit - where a single ad will fill an ad unit because it has a higher likelihood of being clicked.

 

Not true, i m getting these ads on a blog with less than 20 page views per day :O

 

Im guessing the Adsense Team have spotted this Thread - http://adsense.blogspot.com/2005/11/from-mail-bag.html

I also seen Matt Cutts also updated his blog with something relating to spam email on SEO which was on another thread somewhere in here.

 

so how do i check if those CPM ads are earning more or my clicks are earning more?