Comcast connection suddenly much slower

[utssb]

My Comcast broadband connection suddenly became much slower a few weeks ago. It seems very inconsistent and goes in spurts. Sometimes pages will take forever to load, other times it's just as fast as before. Here's the log:

« SpeedGuide.net TCP Analyzer Results »
Tested on: 2012.05.23 16:14
IP address: 174.57.xxx.xx
Client OS/browser: Windows Vista (Chrome 19.0.1084.46)

TCP options string: 020405b40103030201010402
MSS: 1460
MTU: 1500
TCP Window: 65700 (multiple of MSS)
RWIN Scaling: 2 bits (2^2=4)
Unscaled RWIN : 16425
Recommended RWINs: 64240, 128480, 256960, 513920, 1027840
BDP limit (200ms): 2628kbps (329KBytes/s)
BDP limit (500ms): 1051kbps (131KBytes/s)
MTU Discovery: ON
TTL: 115
Timestamps: OFF
SACKs: ON
IP ToS: 00000000 (0)

[RaisinCain]

Windows version? How many people are on your node (guesstimating)?

[utssb]

I have no idea, should I call my ISP or is there an easier way to find out?

[RaisinCain]

I would call them and complain.