First off, I'm not a networking expert....in fact I know very little
- What's your Comcast provisioned speeds? What do you actually get for upload speeds?
- Did you have Comcast put your wireless router in bridge mode? Or are you dealing with a double NAT setup.
Granted, I have no idea if a double NAT slows things down....just asking.
Do you have a chance to test the streaming from a known good network?