To quote the analysis: "MaxCDN, ChinaCache, Akamai, Limelight and Level3 have a higher initwncd value, with MaxCDN being the leader of the pack. For some reason(s) they changed the setting and we are confident they did this for performance reasons." http://www.cdnplanet.com/blog/initcwnd-settings-major-cdn-providers/ Hagen