I see furbz posted in the CISP thread that he's down. So I'm assuming (which I hate to do) his statement about network issues and being down more than up is historic experience from him before jumping ship.
i would say if that is the case it is the responsibility of rocketnet to contact vumatel to find out if there are any problems and display it on their problems page as rocketnet is the one getting paid for the service
once again it is not only about download speed it is about crappy international browsing as well specially after 5pm
when the problem starts it happens to all web pages but international is much worse and it normally starts getting worse from 5pm much like congestion
once again it is more noticeable on the 100 lines and up