[LA] Anybody has packet loss issue with COX in Baton Rouge, LA?

I live in brightside area near LSU. The packet loss problem occurs at night. Called COX for help and three technician came without fixing the problem. Now, I am thinking about switch to AT&T. Anybody has the same issue at night? I also posted this problem at COX internet forum: http://forums.cox.com/forum_home/internet_forum/f/5/t/18569.aspx