Hi Badremodeling
With comcast you should have fairly fast downloads i have comcast and have no problems. Have you forwarded your ports through your router?
Here is a tutorial to do so:
http://portforward.com/english/routers/port_forwarding/Linksys/WRT54GL/WinMX.htm
we can also test you speed by doing a test downlaod at the help room here is the name: MXPie English Help Channel_89623E441A23
you can also do a speedtest here for the maximum speed you could see this must be done with all P2P programs off for an accurate test: SPEEDTEST
http://www.speedtest.net/