There is a new version of this presentation. See https://speakerdeck.com/zachleat/performance-and-responsive-web-design
Nebraska JS talk on November 8, 2012 http://www.meetup.com/nebraskajs/events/74950422/
Correction to Slide #21 per @scottjehl: Use insertBefore instead of appendChild for IE8-: http://paulirish.com/2011/surefire-dom-element-insertion/