I thought you may have been on to something here..
But after changing my tcp settings there is absolutely no change in speeds
« SpeedGuide.net TCP Analyzer Results »
Tested on: 2012.02.29 14:16
IP address: 91.125.xxx.xxx
Client OS/browser: Windows XP (Firefox 6.0.2)
TCP options string: 020405ac0103030401010402
TCP Window: 1045440 (multiple of MSS)
RWIN Scaling: 4 bits (2^4=16)
Unscaled RWIN : 65340
Recommended RWINs: 63888, 127776, 255552, 511104, 1022208
BDP limit (200ms): 41818kbps (5227KBytes/s)
BDP limit (500ms): 16727kbps (2091KBytes/s)
MTU Discovery: ON
IP ToS: 00000000 (0)
if anything they are slightly worse...
My routers MTU is set to 1492
I'll do the W7 in pc tests in a following message..