Internal network will get you that speed... random parts of the internet is always a crapshoot. comcast may route you halfway around the country until you get t

Internal network will get you that speed... random parts of the internet is always a crapshoot. comcast may route you halfway around the country until you get to that other close by server, who knows. Try downloading http://cachefly.cachefly.net/100mb.test http://cachefly.cachefly.net/100mb.test and see what you get, or a few other speedtests randomly in different parts of the country.