I am busy checking how my webserver is doing gzip. I'm confident now that gzip is on as chrome shows the content-encoding: gzip header.Is there a easy way to see how much a file was compressed in the Chrome developer tools? 
Is there an easy way to see amount of gzip compression in Chrome
gzip;compression;google chrome
By far the easiest method is to use an online tool. GIDZipTest shows you plenty of detail: the original size, compressed size and compression percentage.However, it is possible in Chrome with a bit of effort. (Updated for latest Chrome, Sept 2011.)In the Developer Tools, go to the Network tab and reload the page. You will see a list of all the files fetched on the left column. Click the appropriate page/file on the left then the Headers tab on the right pane.Under Response Headers you should see Content-Encoding: gzip followed by a Content-Length header. This is the size of the compressed content.Finding the uncompressed size is more difficult. If you're serving up static files you can simply check its size. For dynamic content you'll have to copy-paste the HTML into a text editor and save it to check the exact size.