No worries. Going back to the original earnings transcripts is nice because then it's official Google statements, not something I'm claiming.

I'd been meaning to find those quotes anyway; back in January, a few skeptical people wondered whether Google "has a disincentive to algorithmically weed out the kind of drivel that exists for no other reason than to make its publisher money via AdSense" -- that's a quote from http://news.ycombinator.com/item?id=2127937 .

What the last two earnings calls show is that Google is willing to accept an impact in our revenue to improve our search quality. So it was a helpful exercise for me to track down the relevant bits from the earnings transcripts.