evidently there are scale/performance issues as it takes >8 seconds before Google’s web server responds to a request for a page that’s ~2K
8 seconds? It’s only 0.5 seconds with me?
For WordPress + W3 Total Cache I think you’ll not win much with mod_pagespeed (I didn’t look in detail if Google is doing some things not yet implemented by W3 Total Cache).
But I’ll surely install mod_pagespeed for my non-wordpress sites. (eg. phpBB forum, java, …) which don’t have the excellent W3 Total Cache features available because it’s not wordpress…
Wim