Site speed is king… is your site optimized for speed?! Or is it on a slow dog of an overloaded server?  Hopefully this will force slow sites to the bottom of the heap for search… I recommend using the YSlow tool in Firefox to diagnose these issues… lots of these are coding issues… but sometimes an optimized database can cause delays…  anyways… pay attention this is a good vid from Google

Official Google Webmaster Central Blog: You and site performance, sitting in a tree….