I have tested with QuickCache, Supercache, W3Cache but in all these cache plugins, Page Cache is generating Cache for inner pages but not for the Home Page. That's little strange.
I also get in touch with Respective Cache plugin developer and they told me that as the theme is using Static Page in the Home page with /%postname%/ in Permalink so I have to ask the theme developer for this. I didnt really understand what that implies.
Could you please highlight me in the right direction?
Confident this isn't theme related. We used to use SuperCache but now moved to W3Total Cache on most of our themes. I would pick a plugin like supercache or w3 and visit those support forums for help. Those plugins are the most supported.
I also noticed http://white-noise.progressionstudios.com is using HomePage1 (Blog) rather then HomePage2 (Static Page). Is this the reason? Anyway, I tried all possible combination by switching in between blog/pages etc. nothing is working.
You can try installing any file based caching plugin and see result for home page of http://white-noise.progressionstudios.com. The caching comments with Timing will not be generated in footer.
I set the homepage to static and everything is cached fine. Feel free to post a link to your site and I'll check it out to see if I notice anything. Otherwise you will have to visit the support forums as I mentioned above. This isn't theme related*.