tedster - 11:38 pm on Mar 23, 2012 (gmt 0)
Ryan Moulton [the Googler involved here] added that those involved in "search don't even see metrics on how their changes effect ads, let alone make decisions based on them." Ryan then explained that when search results "suck" it's because Google's "system is too stupid" to get the right result.
Ryan has had many good discussions on Hacker News over the years. We also note that one of his first projects as a search engineer was defusing the worst of the "googlebombs".