Domain Level AdWords Quality Score...Yes or No?

Anyone who play around with AdWords much knows about the quality score and it's importance in the overall success of a campaign.

In the past 6 months or so I've seen more than one conversation related to a domain level quality score, although this has never been confirmed by G. I've personally never seen any evidence to support the existence of a domain level AdWords quality score...but I honestly haven't spent a ton of time looking into it.

What do you think? Is there a domain level quality score is the landing page quality score really assigned at the page level? You could read between the lines here and say yes, there is a domain level quality score:

Some factors have continued to appear every time we evaluate the most relevant ads and keywords within AdWords. These factors include performance variables like keyword clickthrough rate (CTR), ad text relevance, overall historical keyword performance with Google, and even the user experience on the landing page or site associated with an ad. We put all of these factors and more together to create a Quality Score - the measurement of an ad's quality in relation to each of your keywords.

That's from here: https://adwords.google.com/support/bin/answer.py?answer=10215