blend27 - 6:18 pm on Sep 2, 2010 (gmt 0)
And helps Google to ease the CPU load by letting them cache results of much fewer queries.
Or maybe it helps Google to show more expensive ads if the suggested search applies to some extent. The more generic the term user arrives to at Gorgs Serp the more expensive clicks will be for the Adwords for the companies to get in a top 3 of the Ads.
That is the way I'd do it.