Whitey - 6:30 am on Mar 13, 2011 (gmt 0)

Late last year Matt Cutts indicated in a video that page load speed was live as a ranking factor

Could you reference that video

.... interest me a lot more. Fast sites set off a cascade of effects that can indirectly improve rankings

Me too. What would be the likely list be , in order of importance, that it flows through to.