Google And Page Load Speeds

In summary the key points are:
• Site speed reflects how quickly a website responds to web requests

• While site speed is a new signal, it doesn't carry as much weight as the relevance of a page

• Currently, fewer than 1% of search queries are affected by the site speed signal in our implementation and the signal for site speed only applies for visitors searching in English on Google.com at this point

To see how your site is performing and to get a list of recommended changes start by looking at "Site Performance" within the Labs section of your Google Webmaster Tools.