First Byte Time on Wordpress

[Bushido]

View your page source, if the page is cached W3 will output a message saying it is.

As for time to first byte you might try a wordpress plugin called 'Debug Queries' to see exactly what's going on between wordpress and your database. If you see a lot of extra calls for example you may want to remove other plugins or site functions to lower the number of calls made.

Less is more when it comes to plugins, don't forget to turn off Debug Queries when done testing.