Just about two years ago, Google introduced mod_pagespeed in their ongoing efforts of speeding up the internet.
Yes, we know page speed is a factor in both Google's organic algorithms and paid search algorithms. They have page speed tools in webmaster tools and many other tools for measuring this. So yea, Google wants everyone to speed up their pages.
Honestly, I had my development team try it on a few sites but they decided to remove it shortly after for one reason or another. Maybe not that it is out of beta we will try it again? 47% said they would try it in a poll we ran when it launched.
Googler, Pierre Far added a bit more on Google+:
Yesterday Googlers Joshua Marantz and Ilya Grigorik announced that mod_pagespeed Apache module is out of beta, about 2 years after it was first announced. Awesome, right?
And today I learn from Hacker News about the nascent PageSpeed for nginx project: https://github.com/pagespeed/ngx_pagespeed Double awesome!
If you're not convinced yet you need to invest in your site's performance see this - there are many stories like it:
Forum discussion at Google+.