When I analyze the website's page load speed in Chrome I can see the wait time (where the return response files of the sever are being generated) is 55ms and total page load time is 1 second or much less. When I run the test via
http://gtmetrix.com/, or the Google speed test tool, the wait time is 1.8 seconds or more and total page load time is 3 seconds or more.
The page is fully cached and the cache has been warmed.
Any ideas on why this would happen? The efforts I have made so Google would see my site as fast loading will be lost.
Please don't comment about all other optimization tips like gzip and minifying css files. I am purely asking about the wait time and/o its effects on ttfb.