I was unable to co-present at DrupalCon San Francisco due to a volcanic ash cloud that prevented anyone from flying out of London for a week, so David Strauss did my part instead along with Eric Baumes (CTO of The Economist). Thanks to The Internet Archive, the presentation is available and you can see David doing an excellent job with my slides.

http://www.archive.org/details/PerformanceTestingTheEconomistOnlineUsingTheGrinder