Hi Laura - I see you're still searching for that perfect speed... darn CABLE Co. incentives...
Well, my only suggestion would be to do a series of speed test at the same time everyday. Maybe do your test 3 times a day, like 7:00AM, 1:00PM and 9:00PM, do this for a week and see what your results are like. If you find a pattern, I don't know, but you might find something out. Peak usage in my area is between 3:00PM and 5:30PM, just bustling... Good luck, Rick
BTW - Now that I think about this more, you probably have been doing this already 😉
iMac G5 iSight 20" - 30G iPOD in Slimming Black - HP Pav and Toshiba Sat Mac OS X (10.4.6)