nick30, thanks for taking the time to post on the forums about your connectivity issues especially how it is affecting your gaming!
Are you noticing/tracking ICMP floods as well? I'd be happy to check out your area health to see if there is work going on there that is impacting the service to your modem. Please send me a private message with your full name for help. Just click my name and then on the next page, you'll see an option to send me a private message on the top right hand side.