From the comments, someone notes that GZIP isn't enabled. Someone Pusher replies: "We use Amazon Cloudfront as our CDN right now and achieving this isn't as easy as we'd like it to be. It is on our backlog."<p>As great as AWS and the Cloudfront/S3 combo is, it's maddening that the combo can't serve both gzip and non-gzip versions from the same url [1].<p>[1] <a href="http://stackoverflow.com/questions/5442011/serving-gzipped-css-and-javascript-from-amazon-cloudfront-via-s3" rel="nofollow">http://stackoverflow.com/questions/5442011/serving-gzipped-c...</a>