In the previous post the response was still looking a bit chunky

Response – Bytes Received: 217
HTTP/1.1 200 OK
Cache-Control: private
Content-Type: text/html
Server: Microsoft-IIS/7.0
x-UpdMin: 30
X-AspNet-Version: 4.0.30319
X-Powered-By: ASP.NET
Date: Sat, 19 Jan 2013 10:25:12 GMT
Content-Length: 0

The HTTP headers returned by IIS were a significant portion of the response. I found that there were several different approaches but the simplest to setup was discussed here.

Response – Bytes Received: 113
HTTP/1.1 200 OK
Cache-Control: private
x-UpdMin: 30
Date: Sun, 20 Jan 2013 01:51:37 GMT
Content-Length: 0

V1 573 bytes
V2 480 bytes
V3 376 bytes

With a little effort roughly 200 bytes or 1/3 reduction in payload size. Still some scope for further reductions…