Does Google pays less to Adsense clicks generated from Adwords

can they actually tell the traffic is comming from Adwords

[linuxguy]

I created an adwords campaign using 5 cents keywords very on topic which are not being use by the other folks in ou r industry. Adsense clicks are being generated from this traffic but I have the feeling that this clicks get pay a lot less. So I'm asuming Google actually knows the traffic is originating from adwords and not from serps. Is Adwords leaving a cookie which is then readed by Adsense?

[howiejs]

Google (I believe) tracks the refer .. . .

[eWhisper]

One very interesting theory I heard about AdSense at the WebmasterWorld conference was "Does Google check the page referrer when the AdSense script is loaded to determine the discount rate".

At the engineers conference:
the first one stared blankly at us.
the second one thought it was an interesting idea.
the third said they track the referrer, but aren't using the data yet.

[Oetzi]

Does Google pays less to Adsense clicks generated from Adwords?

Probably. Evidence? Assign a channel to a single page with little but some organic traffic and measure it, then a week later promote the same page with Adwords heavily so that you get a lot more clicks. Now compare the EPCs of the 2 timeframes.

Is the EPC affected also by the keywords you buy? Probably, which makes the whole things more difficult to assess