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.

So Google removed the Beta label from mod_pagespeed:

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+:

Forum discussion at Google+.