fastcgi_cache

Hi folks, wondering if anyone here has tested Nginx php-fpm fastcgi_cache with Google ngx_pagespeed module ?   I am testing Centmin Mod v1.2.3 beta install of Nginx 1.4.1 + PHP 5.3.25 (php-fpm) with ngx_pagespeed 1.5.27.3 beta and wanting to see how it would fair with a fresh Wordpress 3.5.1...