I am using W3 total Cache in all my websites in an VPS with NGNIX, but after analising the speed times in google analitics it is giving an average speed time of 12 seconds.
I think it must be better and speed up my websites.
Can you give me the better settings for the W3 Total Cache and nginx?
In one of the websites (http://www.portal-energia.com) i cannot see the footer comment "<!-- Performance optimized by W3 Total Cache. Learn more: xxx.w3-edge.com/wordpress-plugins/", etc. But the plugin is activated. What is happenning?