Before I used a router, whenever I connected to a preferred server on an online game, such as Team Fortress 2, CS:S, or Halo:CE, i could play just fine an have a steady latency of 45 or so. That was when I plugged the cable straight into the jack.
Now, I have to share my internet, so I constantly have a person on facebook or youtube with a laptop, connected by wireless. I thought the problem would be too much traffic from both of us combined, but even when I'm the only one on it, I still get high ping, typically 150-400. Whenever both of us are on, I'll get insane lag spikes, usually in the thousands.
It is an old route, a Belkin N1, but that shouldn't be much of a problem, right?
My speed is about 8mbps (roughly 1 MBps) on speedtest.com, so I know that's not the problem.