And one more time.....
When the last, or near the last hop, of a trace or Ping Plot shows problems, the problem is actually on the return trip from the server you are hitting. Traces, nor Ping Plot, can show the retun path in cases where the return path is different from the path to the server. This will always be the case with our servers, as AT&T has a fully asynchronous route for inbound and outbound data.
I ran a trace back to you Mega, and found the problem is between XO and Cox. Having your local connection worked on is not going to solve the problem. The problem is in Cox's network itself.