I don't know much about routers, but I do know a lot about cable.
Try a speed test with just your computer hooked up to the modem that you got from Comcast, then hook the computer up through the router and try the speed test again.
www.speakeasy.net
That will give you some kind of idea what your router is doing to your return back to Comcast servers.
Also take a look at the cable wiring in your home. Is is thick commercial grade RG-6, or is it the crappy Radio Shack bought RG-59? (That goes for everybody. Go to Lowes and pick up some RG-6.)
Go outside and look at the cable coming from the pole to your home. Is is old, frayed? Are the connectors rusty? If you can reach the cable, bend it a little. Does it sound crunchy? (If it does it means you have had water in that line.) Do you have any limiting filters on your line?
A biggie is splitters. If the splitter has gotten water in it, then it's toast. Your cable modem should be on what we refer to in the business as a "Home Run". This means that when the cable from the pole gets attached to the house it gets put on one Two-Way splitter. The first split goes to the cable modem and the rest of the house gets fed off of the other. And if you have a lot of outlets in your house you might have a subscriber amplifier. Your modem should definitely not be going though that.
Also, believe it or not if your signal to your house is too good, it can knock it offline! The signal level hitting your modem should be 0 dBmV. You can have this checked by Comcast, they might not get it perfect but it should be within a certain parameter. You can ask for a technician to come out to your home and replace your outside wiring, splitters, and amp (if you have one). The inside stuff is your business, unless you want to pay an arm and a leg for us to replace it.
Remember, all of these factors can frack up your gaming experience. Every serious gamer should take a look at the things that I have mentioned here and make sure they get taken care of. When it comes to online gaming, you're only as good as your connection.
I have been having problems with disconnects from Socom 3. This consistantly happens every 30 to 60 mins. I dont know if its the latest patch or the fact I have switched to Comcast Cable HSI 6 - 11Mbps/384. I know its not my router because I can monitor all my connections LAN/WAN and everything stays connected. This never happened while I had SBC DSL 384 - 1.5Mbps/260
