(written by unicorn)

Your Rectangle has a regular cpm of 10 $.

You deliver the banner from dfp-activate-adsense (inhouse).

-> You get a cpm of 10$

Now, the myth:

Your Rectangle has a regular cpm of 10 $.

You deliver the banner from dfp-activate-adsense (inhouse).

You create any house campagin (the ones that compete with inhouse adsense) of 11$

-> You get an adsense cpm of 11$

So, the myth has to be right as adsense competes with house campaigns. The question remains, if adsense delivers most of its banners (90%+ delivery of adsense, 10%- of house campaign).