Hi WadeG,
I was wondering if you could post the results of a tracert to a site (i.e., google.com, or whatever)? I just noticed that I hadn't seen anything like that posted in your thread. I'm curious as to who/where Mediacom is peering for your geographic area.
I'm in central Iowa, but if I attempt to run Speedtests to servers that are physically located nearby or even in the state, I receive inaccurate/seemingly poor results--and there is fiber strung and buried all over this land of corn and soy beans! The reason for these results is because Mediacom peers with other major infrastructure in Chicago for my service area, so internet traffic has to take a very circuitous and congested route to get back to servers that are physically close to me. However, when I run Speedtest against servers in Chicago (specifically the Comcast one there), I often see single-digit ping times (i.e., sometimes less than 5ms!) and speeds that very accurately reflect my subscribed rates. For example:
Perhaps if we can figure out where Mediacom peers for your area, we can get a much more accurate measurement. When you're seeing pings of 100ms+, you're not going to get a very accurate measurements of your subscribed speeds. I've run into your exact issue before when working with clients and friends around the state that use Mediacom, too, and it's tough to know where the measurement should be taken without knowing where Mediacom is peered.