I had a similar problem here in Texas... Warner Cable had laid too long a line to my house using inferior wiring. It degraded in the ground and since they have had to rewire me about 6 times... The current wiring works at about 3kbps - 4.5kbps but no more. Speed suffered when the built apartments in the area (a block of flats) and connected them all in the the local server.
The more people connected to the area server the slower it is... All the teenagers in those apartments seem to want to do is limewire for MP3s (or porn) and it slows down to a crawl by 16:00 here!!! Does not speed up till midnight!!!
The more people connected to the area server the slower it is... All the teenagers in those apartments seem to want to do is limewire for MP3s (or porn) and it slows down to a crawl by 16:00 here!!! Does not speed up till midnight!!!