Wicked Slow Router Speeds

Are you connecting to the router with Ethernet or through the wireless? Tried resetting to defaults? Checked the Linksys FAQs?

Sounds like the MTU is set to high. Lower it to 1492, or 1400 for testing.

The MTU for Ethernet should be around 1500 I think. Unless you've changed it, I think that's what the default is. I would try resetting the router to defaults, if that doesn't work, chances are something is wrong with the router. If you had another router you could try, that would tell you for sure if it's the router itself.