Why Does it Take So Long for Cox Internet to Respond?

Why does it take more than ONE MINUTE following every click on the Cox.net web site, to access my Classic Webmail, for the Cox server to respond? When I spoke with Cox Technical Support two days ago, I was informed this is "a known issue." What does that mean? Am I - and everyone else - going to get some rebate from our "High Speed Internet" monthly bill for this "known issue"? How many other people are having these slow connection issues?