Have you guys tried pinging your modem from outside, like from your job?
Find out your Adelphia IP address by browsing to www.dnsstuff.com and look at the top right part of the browser, it should say your ip.
Then from your job or some friends house, ping that ip and see how fast it is, in Windows Goto Start Button and in Programs look for the Run command, type cmd and hit enter, this opens the Command Prompt, type ping and then type you IP, hit enter and the ping process begins.
After three or four lines, look for where it says:
Approximate round trip times in milli-seconds:
Minimum = 183ms, Maximum = 191ms, Average = 187ms
Average it what you are looking for. Mine just no gave me 187, which for online gaming is a disaster, 90 ms is about good.