One of my WP-Minify users emailed me the other day referencing me to this post on the Google Adsense blog. In summary, the article says that Google will start including your site speed to figure out how you rank in their search results page.
I believe that Google is doing the right thing here. I also believe that top sites that show up on search results pages shouldn’t be overly slow (else it’ll ruin my search experience).
WP-Minify and WP Super Cache are the two easiest things you can implement on your WordPress blog to give you site a huge speed boost. You should definitely take an hour out of your day to install these two plugins to make sure Google won’t de-rank you due to your site speed.
Also make sure to spread the word to your friends and followers about this!